Editing Cancellation (mail)

{{Short description|Postal marking to deface a stamp and prevent its re-use}}
[[File:Boyle 70 numeral.jpg|right|thumb|Numeral 70 identifying [[Boyle, County Roscommon|Boyle]], diamond bars for [[Ireland]]]]
[[File:Carimbo selo Papa Francisco (JMC 2013).JPG|thumb|Hand stamp of the type used to cancel postage stamps]]
[[File:Cover Bahamas 1929 front.jpg|thumb|1929 machine cancellation used to cancel 1d stamp on [[first flight]] cover from [[Nassau, Bahamas|Nassau]] to [[Miami]]]]
A '''cancellation''' (or '''cancel''' for short; French: {{lang|fr|oblitération}}) is a [[postal marking]] applied on a [[postage stamp]] or [[postal stationery]] to deface the stamp and to prevent its reuse. Cancellations come in a huge variety of designs, shapes, sizes, and colors. Modern cancellations commonly include the date and post office location where the stamps were mailed, in addition to lines or bars designed to cover the stamp itself. The term "[[postmark]]" refers specifically to the part that contains the date and posting location, but the term is often used interchangeably with "cancellation" as it may serve that purpose.<ref>L.N. Williams, ''Fundamentals of Philately'' (American Philatelic Society, State College, PA rev. ed. 1990) p. 20.</ref> The portion of a cancellation that is designed to deface the stamp and does not contain writing is also called the "'''obliteration'''"<ref name="scott1">[[#Scott US|Scott US]] p. 30A.</ref>  or '''[[Killer (philately)|killer]]'''. Some stamps are issued  '''pre-cancelled''' with a printed or stamped cancellation and do not need to have a cancellation added.

==History==
The first adhesive [[postage stamp]] was the [[Penny Black]], issued in 1840 by [[Postage stamps and postal history of Great Britain|Great Britain]].  The postal authorities recognized there must be a method for preventing reuse of the stamps and simultaneously issued handstamps for use to apply cancellations to the stamps on the envelopes as they passed through the postal system.<ref name="sg_p42">[[#Stanley Gibbons|Stanley Gibbons]], p. 42.</ref>  The cancels were handmade and depicted a [[Maltese cross]] design.  Initially, the ink used was red, but it was found that this could be cleaned off and the stamps reused, and so after a series of experiments, early in 1841 black cancelling ink was used, which was more permanent. The color of the stamps was also changed to red-brown so as to ensure that the cancellation showed clearly.<ref name="sg_p42"/>

Britain soon abandoned the Maltese crosses and in 1844 began to employ cancellations displaying numbers which referred to the location of mailing.<ref>[[#Stanley Gibbons|Stanley Gibbons]], pp. 51-55.</ref>  A similar scheme was used for British stamps used abroad in its colonies and foreign postal services, with locations being assigned a specific letter followed by a number, such as A01 used in Kingston, Jamaica, or D22 for Venezuela.<ref>Stanely Gibbons, ''Stamp Catalogue, Part 1, British Commonwealth 1987'', London & Ringwood (89th ed. 1986), pp. GB65-GB72.</ref>

[[File:US stamp 1851 3c Washington.jpg|upright|thumb|An 1851 U.S. stamp with a [[pen cancel]]lation]]
Early cancellations were all applied by hand, commonly using hand stamps.  Where hand stamps were not available, stamps often were cancelled by marking over the stamp with pen, such as writing an "x".  Pen cancellations were used in the United States into the 1880s,<ref name="scott2">[[#Scott US|Scott US]] p. 29A.</ref> and in a sense continue to this day, when a postal clerk notices a stamp has escaped cancellation and marks it with a ball point pen or [[marker pen|marker]].

[[File:Sicily13.JPG|thumb|upright|1859 stamp of Sicily with deferential cancellation designed not to deface the "sacred image" of [[Ferdinand II of the Two Sicilies|King Ferdinand II]]<ref>Franco Filanci, ''Lettera & Francobollo: Raccontiamola giusta'' Reggiani, Italy 2008, p. 16.</ref>]]

In the early period of the issuance of postage stamps in the United States a number of [[patent]]s were issued for cancelling devices or machines that increased (or were purported to increase) the difficulty of washing off and reusing postage stamps.  These methods generally involved the scraping or cutting-away of part of the stamp, or perhaps punching a hole through its middle.  (These forms of cancellation must be distinguished from [[perfins]], a series of small holes punched in stamps, typically by private companies as an anti-theft device.)

High speed cancellation machines were first used in Boston between 1880–1890 and subsequently throughout the country.<ref name="scott2"/>

Today, cancellations may either be applied by hand or machine.  Hand cancellation is often used when sending unusually shaped mail or formal mail (e.g., wedding invitations) to avoid damage caused by machine cancellation.

Postal meter stamps and similar modern printed to order stamps are not ordinarily cancelled by postal authorities because such stamps bear the date produced and can not readily be re-used.

==Types of cancellations==
* '''[[Socked on the nose|Bullseye cancellation]]''', also called "Socked on the nose" or SOTN, is a stamp collector's term for a cancellation, typically of circular design, centered on the postage stamp. Such cancellations are popular with some stamp collectors because of their neatness and the fact that the time, date, and location where the stamp was used may be readily seen. The prevalence of bulls-eye cancellations varies considerably by country and time period.
* '''[[Cancelled-to-order]]'''.  Cancelled-to-order stamps, also known as CTOs, are stamps that have been cancelled by a postal authority, but were never used to transmit mail. CTOs are created by postal authorities to sell the stamps cheaply to stamp collectors.  Many Eastern European countries and others sold great numbers of CTOs to collectors in the 1950s–1990s strictly for revenue.  CTOs often may be identified as the stamps still retain their original gum.  Some authorities use the same canceller for all CTOs, and apply it very neatly in the corner of four stamps at one time. In some instances, the "cancellations" are actually printed as part of the stamp itself.
* '''Deferential cancellation''' is a cancellation designed so as not to deface the image of the ruler or regent on the stamp.<ref>[http://www.askphil.org/b25d.htm Glossary of Stamp Collecting Terms] {{Webarchive|url=https://web.archive.org/web/20120412204318/http://127.0.0.1/ |date=2012-04-12 }}.</ref>

[[File:Canada37.jpg|upright|thumb|Fancy cancel on 1872 Canada stamp]]
* A '''[[duplex cancel]]''' includes a postmark as well as the cancellation.<ref>{{cite web |url=http://glossary.usstamps.org/glossary5.html |title=Glossary of Terms for the Collector of United States Stamps |access-date=2009-05-07 |url-status=dead |archive-url=https://web.archive.org/web/20070913192456/http://glossary.usstamps.org/glossary5.html |archive-date=2007-09-13 }}</ref>
* '''[[Fancy cancels]]'''.  In the second half of the 19th century, many postmasters in the United States and Canada cut their own cancelers from [[Cork (material)|cork]] or wood in a great variety of designs such as stars, circles, flags, chickens, etc.  These are known as fancy cancels and have been heavily studied by philatelists and collectors.<ref name="scott2"/>  One of the most famous is the "kicking mule" used in the 1880s.<ref>Lee Henry Cornell, ''The tale of the kicking mule; a handbook dealing with the famous kicking mule cancellation used in several western towns in the "eighties"'' (Printcraft Shop, Wichita 1949).</ref>
* '''[[First day of issue]]''' are special cancellations with the date the stamp is first issued for sale and include the words "First day of issue."
* '''Flag cancellations''' are a type of machine cancellation incorporating  a design of the United States flag with the stripes serving as the "killer".  The first machine flag cancel (preceded by fancy cancels of flags) was used in Boston in November–December 1894.<ref name="scott2"/>
* '''Handstamped cancellations''' are cancellations added by means of a hand stamping device.
* '''Highway post office cancels''' refers to cancels added in transit by portable mail-handling equipment for sorting mail in trucks.<ref name="linns.com">{{cite web|url=https://www.linns.com/insights/glossary-of-philatelic-terms.html|title=Glossary of Stamp-Collecting Terms For New Collectors - Linns.com|website=Linn's Stamp News}}</ref>
* '''[[Machine postmark|Machine cancellations]]''' are automatically added by machines that rapidly process large numbers of envelopes.  A 1903 silent film of an operating cancelling machine may be seen [http://memory.loc.gov/mbrs/awal/0870.mpg here].
* '''Mute cancel''' refers to a cancellation that includes no writing and thus "does not speak."
* '''Numeral cancels''' are cancels whereby number were used to identify specific post offices. For the [[United Kingdom of Great Britain and Ireland]], which started using numerals in 1844, the shape of bars indicate the actual country of use. Numerals were also used in combination with a datestamp in duplex cancellations.
* '''[[Pen cancel]]s''' refer to the use of a writing [[pen]] to deface the stamp, and were more common in the 19th and early 20th centuries.
* '''Pictorial cancellations''' include images associated with the commemoration of some event or anniversary.  Some people attempt to use stamps relating to the theme of a pictorial cancellation on the envelope.<ref>{{cite web|url=http://www.mcgees.org/postalcancel/postalcancelintro.shtml|title=Postal Cancel Art|website=www.mcgees.org|access-date=2002-09-01|archive-url=https://web.archive.org/web/20021014021548/http://www.mcgees.org/postalcancel/postalcancelintro.shtml|archive-date=2002-10-14|url-status=dead}}</ref>  See further below.

[[File:Stamp US 1938 2c precancel.jpg|upright|thumb|U.S. 1938 precancelled stamp]]
* '''[[Precancel]]s''' are stamps that have been issued with printed cancellations on them, typically to mass mailers. Precancels cannot normally be used by the general public.
* '''[[Railway post office|Railway post office (R.P.O.) cancels]]''' refer to cancellations applied on mail sorted on trains.  The first United States cancellation with the word "railroad" dates from 1838.<ref name="scott1"/>  The last Railway Post Office (R.P.O.) operated by the United States closed in 1977.<ref name="linns.com"/>
* '''[[Mail steamer|Ship cancels]]''' were added to stamps that were mailed on or carried on a ship, commonly a steamer ship in the late 19th–early 20th centuries.<ref name="scott1"/>  In French, the cancellation reads "'''Paquebot'''".<ref name="linns.com"/>
* '''Slogan cancellations''' contain a slogan, perhaps commemorative or advertising, in the killer box.  See further below.

==Pictorial and special cancellations<span class="anchor" id="Pictorial cancellation"></span><span class="anchor" id="Special cancellation"></span>==
[[Image:Somnathpur pictorial cancellation.JPG|right|thumb|This post box is located at a historical site [[Somnathpur]] in [[Karnataka]], India.  Letters posted in this box will receive a pictorial cancellation with an image of the Kesava temple. ]]
The [[United States Postal Service]] distinguishes between '''special cancellations''' which have a caption publicizing an event,<ref>There are regulations pertaining to the special cancellations. See [http://pe.usps.com/text/dmm300/608.htm#wp1227808 Philatelic (Stamp Collecting) Services: Special Cancellations] (retrieved 15 June 2007)</ref>  and '''pictorial cancellations''', which contain an image of some sort.<ref>{{Citation |url=http://www.usps.com/cpim/ftp/pubs/pub186/welcome.htm |title=USPS: Celebrating With Pictorial Postmarks |archive-url=https://web.archive.org/web/20090509032623/https://www.usps.com/cpim/ftp/pubs/pub186/welcome.htm |archive-date=May 9, 2009 }}</ref> Special cancellations are essentially a type of slogan cancellations.  The [[USPS Building Bridges Special Postal Cancellation Series]], a unique series that began in 1996,<ref>{{cite news |title=Unique Postal Cancellation Marks Expo |url=https://www.eastbaytimes.com/ |access-date=9 Dec 2020 |work=Newspaper |agency=Contra Costa Times |publisher=Contra Costa Newspapers |date=4 April 1996}}</ref> combines both a pictorial drawing and an event slogan in what USPS refers to as a cancellation series, even though it also contains a pictorial element.<ref>{{cite news |last1=Taylor |first1=Mary Corbin, Tracy |title=Post Office marks 70 years of music recording in Berkeley with special postmar |url=https://www.berkeleyside.com/2018/11/16/post-office-marks-70-years-of-music-recording-in-berkeley-with-special-postmark |access-date=9 Dec 2020 |work=Newspaper |agency=Berkelyside Newspaper |publisher=Cityside Building Community Through Journalism |date=16 Nov 2018}}</ref>
[[Image:Postmark US airmail saves time.jpg|right|thumb|A 1929 pictorial cancellation promoting the use of airmail]]
In the United States, official pictorial cancellations are almost invariably applied at special "stations", i.e., [[post office]]s existing only for a limited time,<ref>{{cite web |last1=Ruiz |first1=Augustine |title=USPS Building Bridge Special Postal Cancellation ~ Commemorating 30th Birthday of Lady Washington Tall Ship |url=https://about.usps.com/newsroom/local-releases/ca/2019/0422-postal-cancellation-lady-washington-tall-ship-pier-39.htm |website=USPS.com |publisher=United States Postal Service |access-date=9 Dec 2020}}</ref> usually one day, at special events,<ref>{{cite web |last1=Ruiz |first1=Augustine |title=Special Postal Cancellation Marks 100th Anniversary of Opening Day on both sides of the San Francisco Bay |url=https://about.usps.com/news/state-releases/ca/2017/ca_2017_0417a.htm |website=USPS.com |publisher=United States Postal Service |access-date=9 Dec 2020}}</ref> although there are frequently other pictorial cancellations that are not officially described as such—they are among what are called special cancellations and are special die-hubs added to machine cancels, which usually contain merely a slogan but sometimes contain a picture.
There are a very few exceptions in which a particular post office uses a pictorial cancellation on all its mail. 
<!-- Deleted image removed: [[Image:DC3Stamp.JPG|right|thumb|A cancellation showing [[Douglas, Isle of Man|Douglas]], [[Isle of Man]] and the [[Douglas DC-3]]]] -->
The range of allowable subjects is very broad, and may include a variety of commercial tie-ins, such as to movie characters.

[[Canada Post]] uses automated cancellations with computer-printed messaging. In this way, the corporation can automatically print promotional messages on each envelope while simultaneously cancelling the piece of mail. Messages change throughout the year, and include seasonal messages ("Merry Christmas / Joyeux Noel") and promotional messages (such as Canada Post's web address).

Other post offices such as the [[Isle of Man Post|Isle of Man Philatelic Bureau]] also create special pictorial cancellations as they did in 1985 to mark the anniversary of the aircraft Douglas [[DC-3]].  A special handstamp was created <ref name=LS-13-12-1985 >Top-flight honour for schoolboy - Front Page - Lincolnshire Standard - 13 December 1985</ref> depicting a Dakota flying "free" and not "boxed in".<ref>Special Dakota Cover Inside Information Card - [[Isle of Man Post|Isle of Man Philatelic Bureau]] - 17 December 1985</ref>

==Collectors==
Cancellations can affect the value of stamps to collectors, positively or negatively. Cancellations of some countries have been extensively studied by [[philatelists]], and many stamp collectors and postal history collectors collect cancellations in addition to the stamps themselves.

Generalist stamp collectors usually prefer '''lightly cancelled''' stamps which have the postmark on a corner or small portion of the stamp without obscuring the stamp itself, which ordinarily are more valuable than '''heavily cancelled stamps'''.<ref>See, e.g., [[Scott Catalogue]], note preceding Great Britain listings.</ref>  In order to get the postal clerk to cancel the stamps lightly, collectors may rubber-stamp or write "philatelic mail" on the envelope.

Cancellations may significantly affect the value of the stamps.  Many stamps are rarer, and consequently much more expensive, in unused condition, such as the Penny Black, which in 1999, catalogued for $1,900 mint and $110 used.<ref>[[Scott Catalogue]], Great Britain, no. 1.</ref>  The reverse is true for some stamps, such as the hyperinflation stamps of [[Postage stamps and postal history of Germany|Germany]], which may be worth many times more if genuinely postally used.<ref name="catalogue1">[[Scott Catalogue]], Germany, no. 161-321 and note preceding no.161.</ref>  Where stamps are much more valuable in used condition than unused, it may be advisable to  have such stamps [[Expertization|expertised]] to confirm that the cancellation is genuine and contemporary.<ref name="catalogue1"/>

Some stamp collectors are interested in the cancellations themselves, on or off cover, of a particular country or issue, or collect a specific type of cancellation, such as fancy cancels. Birth date cancels are also collected.<ref>See External Links: Other, below</ref> There have been many published studies of the cancellations of many countries, some of which are listed below.  Collectors who are interested in the cancellations themselves prefer bold, readable cancellations.  Cancellations also are an integral part of the collection of [[postal history]].

Historically, collectors disliked pen cancels and removed many of them, making the stamp appear unused or to add a fake cancellation.<ref name="scott2"/>  Today, early United States pen cancelled stamps still are worth considerably less than examples with  hand stamped cancels.<ref>See, e.g, [[#Scott US|Scott US]] values for nos. 1-39.</ref>

Collectors generally view modern cancelled-to-order stamps or CTOs as philatelic junk, and they rarely have any significant value.<ref>{{cite web |title=Postmarks |author=<!--Staff writer(s); no by-line.--> |url=http://www.linns.com/reference/postmark/basic_postmarks.aspx |access-date=June 26, 2015 |archive-url=https://web.archive.org/web/20150318065946/http://www.linns.com/reference/postmark/basic_postmarks.aspx |archive-date=March 18, 2015}}</ref>  Stamp catalogs commonly state whether their values for used stamps are for CTOs or for postally used examples.  For example, the Scott Catalog used value listings for the German Democratic Republic are for CTOs from 1950 through mid-1990, over 2700 stamps.<ref>''Scott 1999 Standard Postage Stamp Catalogue, Vol. 3'' Germany listings, note preceding no. 68.</ref>

==Forgeries==
{{main|Philatelic fakes and forgeries}}
Forgers have not only manufactured stamps for the philatelic market but also added forged cancellations to those stamps. This was especially common in the late 19th century and the early 20th century, when huge numbers of inexpensive stamps were forged for the packet trade.<ref>See generally, [[Robert Brisco Earée|R.B. Earée]], ''Album Weeds; How to Detect Forged Stamps'' (3d Ed. reprint, Manuka-Ainslie Press, Acton, Canberra n.d.).</ref>

Forged cancellations have also been applied to genuine stamps if the stamps are worth much more postally used. In addition, if rare cancellations are desired by collectors, those cancellations have also been forged.

Cancellations may also be used to prove that certain philatelic items are genuine.  For example, forgers have fabricated many supposedly-valuable postal covers by adding genuine stamps and forged postal markings to pre-stamp covers.<ref>See, e.g., Jean-François Brun, ''Out-Foxing the Fakers'' (American Philatelic Society, State College, PA 1993), Chapter 6.</ref> A cover can be shown to be genuine if a genuine cancellation "ties" the stamp or stamps to the cover or, in other words, if a genuine cancellation runs continuously over the stamp and adjacent portion of the envelope. However, one still may need to rule out the possibility that the cancellation was added later. Similarly, stamps that were cut in parts and used for a portion of the full value as [[Bisects and splits (philately)|splits]] can be shown to have been so used only if a genuine cancel ties the stamp to the cover or piece of cover.

==Cancellation symbols==
The [[Michel catalog|Michel stamp catalog]] uses a set of symbols for different types of cancellations:<ref>Michel (2007) Übersee-Katalog. Band 1/1 Nordamerika 2007/2008. Unterschleissheim Schwaneberger, p. 18.</ref>
*[[file:Sun symbol (fixed width).svg|16px|☉]] [[postmark]] cancels (used in less precise catalogues for any cancellation)<ref>Silvia Vaccari, [https://www.airmailandspace.com/en/content/10-symbols-and-abbreviations Posta Aerea e Spazio]</ref>
*[[File:Pen cancelation symbol.svg|16px]] [[pen cancel]]s
*[[File:Part of Fortune symbol.svg|16px|🝴]] [[fiscal cancel]]s
*[[File:CTO symbol.svg|16px]] [[cancelled-to-order]]
*[[file:Full moon symbol.svg|16px|🌕]] hole-punch cancels
*Ⓢ special-issue postmarks
*Ⓣ date postmarks

Philatelic dealers and auctioneers may use entirely different sets of symbols.

==See also==
* [[Postage stamp reuse]]
* [[Postage meter]]
* [[Event cover]]

==References==
{{Reflist}}

===Sources===
* <cite id="Scott" US> ''Scott 1999 Specialized Catalogue of U.S.Stamps & Covers''  (Scott Pub. Co. Sidney, OH 1998).</cite>
* <cite id="Stanley" Gibbons> ''Stanley Gibbons GREAT BRITAIN Specialized Stamp Catalogue, Vol. I, Queen Victoria'' (16th ed. 2011). </cite>

==Studies of cancellations==
'''Great Britain, Ireland & Commonwealth'''
* R.C. Alcock & F.C. Holland, ''The Postmarks of Great Britain and Ireland, 1660–1940'' (Alcock, Cheltenham 1940)(and supplements).
* George Brumell, ''British Post Office Numbers 1844–1906'' (Alcock, Cheltenham 1971).
* Robert Danzig & David Goldsmith, ''The Cancellations of the 1841 Penny Red'' (Philatelic Imprint, London 1991).
* William Kane, ''Catalogue of the postal markings of Dublin, c. 1840–1922'' (M.P.Giffney, Dublin 1981).
* John Parmenter, Michael Goodman, & John Saylor Jr., ''Barred Numeral Cancellations, Vols. I-IV'' (1985–1988).
* H.C. Westley, ''The Postal Cancellations of London, 1840–1890'' (H.F. Johnson 1950).
* J.T. Whitney, ''Collect British Postmarks: Handbook to British Postal Markings and Their Values'' (British Postmark Society).
* H.M. Campbell, ''Queensland cancellations and other postal markings 1860–1913'' (Royal Philatelic Society of Victoria, Melbourne 1977).
* J.R.W. Purves, ''Victoria: the "Barred Numeral" Cancellations, 1856–1912, and the post offices which used them'' (Royal Philatelic Society of Victoria, Melbourne 1963).
* R.J.G. Collins, ''The Cancellations of New Zealand: with notes on the early philatelic history'' (Kiwi Publishers Christchurch, N.Z. 1926 (1995)).
* Tom Lee & John Watts, ''New Zealand pictorial and special event date stamps, 1882–2002'' (North Shore Philatelic Society, Auckland 2002).
* H.C. Dann, ''The cancellations of the Rhodesias and Nyasaland'' (Robson Lowe Ltd., London 1950).
* D.R. Martin, ''Numbers in Early Indian Cancellations, 1855–1884'' (Robson Lowe, London 1970).
* Webb, F.W. '' The Philatelic and Postal History of Hong Kong and the Treaty Ports of China and Japan'' (1961, reprinted James Bendon, Ltd., Cyprus 1991)
* Schoenfeld, H.  ''Cancellations of the Treaty Ports of Hong Kong, 1850–1930 (1998)''
* Proud, E.B. ''The Postal History of the British Colonies: Hong Kong, Volume 1: 1841–1958'' (1989)

'''United States'''
* James M Cole, ''Cancellations and Killers of the Banknote Era, 1870–1894'' (U.S. Philatelic Classics Society Columbus, OH 1995).
* Kenneth L. Gilman,  ''The New Herst-Sampson catalog : a Guide to 19th century United States Postmarks and Cancellations'' (D.G. Phillips Pub. Co.  North Miami, FL 1989).
* R. F. Hanmer,  A collector's guide to U.S. Machine Postmarks, 1871–1925: with examples of later types (D.G. Phillips Pub. Co. North Miami 3d rev. ed. 1989).
* Herman Herst Jr., ''Fancy Cancellations on Nineteenth Century United States Postage Stamps'' (Shrub Oak, New York 3rd rev. ed. 1963).
* Foster W. Loso, ''Twentieth Century United States Fancy Cancellations'' (Somerset Press,  c. 1952).
* Moe Luff, ''United States Postal Slogan Cancel Catalog'' (Spring Valley, N.Y. rev. ed 1968).
* Sol Salkind,  ''U.S. Cancels 1890–1900, with Special Emphasis on the Fancy Cancels found on the 2¢ Red Definitive Stamps of this period'' (David G. Phillips Co. c. 1985).
* Hubert C. Skinner & Amos Eno,  ''United States Cancellations, 1845–1869:Unusual and Representative Markings'' (American Philatelic Society,  State College, PA 1980).
* Scott R. Trepel, ''U.S. postmarks and cancellations'' (Philatelic Foundation, New York 1992).
* William R. Weiss Jr. & Foster W. Loso, ''The Complete Pricing Guide of United States 20th Century Fancy Cancellations'' (W.R. Weiss Jr.  1987).
* Michel Zareski & Herman Herst, ''Fancy Cancellations on 19th Century United States Postage Stamps'' (Shrub Oak, NY. 3d rev. ed. 1962).

'''Austria-Hungary'''
* [[Edwin Mueller]], ''Handbook of Austria and Lombardy-Venetia Cancellations on the Postage Stamp Issues 1850–1864'', Wien 1961, including a unique valuation system referred to as [[Valuation of cancellations of the Austrian Empire|"Points Mueller"]].
* Edwin Mueller, ''Die Poststempel auf der Freimarken-Ausgabe 1867 von Österreich und Ungarn'', 1930
* Wilhelm KLEIN, ''Die postalischen Abstempelungen auf den österreichischen Postwertzeichen-Ausgaben 1867, 1883 und 1890'', 1967 (in German)

'''Belgium'''
* NIPA, ''Catalogue spécialisé des oblitérations belges 1849–1910'', 1999 (nl-fr)

'''Canada'''
* K. M. Day, ''Canadian Fancy Cancellations of the Nineteenth Century'' (British North America Philatelic Society, Toronto 1963).
* D.M. Lacelle,  ''Fancy cancels on Canadian stamps 1855 to 1950'' (British North America Philatelic Society Ltd., Ottawa 2007).
* Lewis M. Ludlow, ''Catalogue of Canadian railway cancellations and related transportation postmarks'' (L.M. Ludlow, Tokyo 1982).
* G.Douglas Murray, ''2000 postmarks of Prince Edward Island, 1814 to 1995'' (Retrospect Pub., Charlottetown, PEI 1996).
* Cecil C. Coutts, ''Slogan Postmarks Of Canada'' (Agassiz-Harrison Printers & Stationers Ltd., Agassiz British Columbia 2007)

'''France'''
* Jean Pothion, ''France Obliterations 1849–1876'' (La Poste aux Letters, Paris 1975).

'''German States'''
* Hans GROBE,''Altdeutschland Spezial-Katalog und Handbuch'', 1975 (in German)
* Peter SEM, ''BAYERN Spezialkatalog, Handbuch Kreuzerausgaben'', 1985 Bamberg
* A. von Lenthe, ''Hannover Postanstalten und Poststempel'', 1971 (in German)
* Friedrich SPALINK, ''Die Deutschen Hufeisen Stempel'', 1974 Selbstverlag (the famous German horseshoes)
* Peter FEUSER, ''Nachverwendete Altdeutschland-Stempel'', 1983 (for cancellations still in use after unification of Germany)

'''Netherlands'''
* H. Koopman, ''Catalogus der Puntstempels van Nederland'', Uitgave van Van Dieten Boeken, 1972 (with prices for 259 numbers)
* H. Koopman, ''Catalogus der Kleinrond stempels van Nederland'', 1972 (with prices)
* Dr. Fred. L. Reed, ''De Halfrondstempels op de Emissie 1852 Nederland'' (en: ''The Halfround Postmarks on the First Issue of the Netherlands'', with values expressed in Points), published by J.L. Van Dieten (Den Haag)
* D.C. Hoogerdijk, ''De Naam - of Langstempel van Nederland, met prijsnoteringen'', 1972, with values expressed in Gulden (1 to 2500), published by W.H. De Munnik, 's-Gravenhage.

'''Latin America'''
* Joseph Schatzkes (rev. Karl H. Shimmer), ''The Cancellations of Mexico, 1856–1874'' (W.E. Shelton n.p.&nbsp;1983).
* Lamy et Rinck, ''[[Lamy (and Rinck)|PEROU Oblitérations postales de 1857 à 1873, Classification et cotation]]'', 1964 (in French)

'''Elsewhere'''
* [[Archibald G. M. Batten|Archibald G.M. Batten]], ''The Postmarks of the Orange Free State and the Orange River Colony, 1868–1910'' (1972).
* Roger Hosking, ''Paquebot Cancellations of the World'' (Oxted 1977).
* Derek Willan (editor), ''Greek Rural Postmen and Their Cancellation Numbers'' (Hellenic Philatelic Society of Great Britain, 1994)
* John H. Coles & Howard E. Walker, ''Postal Cancellations of the Ottoman Empire'' (Christie's-Robson Lowe, London [1984]–1995).
* Resımlı Osmanli ''Illustrated Ottoman Turkish Postmarks 1840–1929'' (Tűrk Posta Damgalari) (10 vols in process).

== External links ==
{{Commons category|Postmarks}}

=== Organizations ===
* [http://bob.trachimowicz.org/uscc/index.html The US Cancellations Club]
* [http://www.machinecancel.org/ The International Machine Cancel Society]
* [https://web.archive.org/web/20110514154008/http://www.uspcs.org/uspcs1869.html U.S. Philatelic Classics Society]
* [http://www.precancels.com/PSS/pssinfo.htm The Precancel Stamp Society]
* [http://www.britishpostmarksociety.org.uk/ British Postmark Society]
* [http://www.postmarks.org/ Post Mark Collectors Club]
* [https://web.archive.org/web/20090204210349/http://www.jeffhayward.com/bccc/ Bullseye Cancel Collectors' Club]

=== Other ===
* [https://www.loc.gov/item/00564539/ Silent Video (mpg) from 1903 of operation of Cancelling Machine]
* [http://about.usps.com/handbooks/po230.pdf Pictorial Cancellations Handbook, United States Postal Service]
* [http://www.stampsonstamps.org/csaposos.htm Classic Stamps and Postmarks on Stamps of Spain]
* [http://losanges.chiffres.pagesperso-orange.fr/page1a.html French numeral cancellations 1852–1876]
* [http://www.stampsandstuff.net/a.html Cancelled stamps with your birth date in the cancellation mark]

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[[Category:Postal markings]]
[[Category:Philatelic terminology]]
[[Category:Stamp collecting]]

[[pl:Datownik]]