Editing Cash (section)

==Banknote tracking==
In most jurisdictions, banknotes are not routinely tracked by serial number. There are the following exceptions in cash applications:
* Registration of [[ransom|ransom money]] for [[blackmail]] (e.g. for the [[Richard Oetker#kidnapping|Oetker kidnapping]]<ref>{{Cite journal |title=Lösegeld: Versteck gefunden |journal=FOCUS |url=https://www.focus.de/politik/deutschland/versteck-gefunden-loesegeld_id_1880257.html |last=Götz |first=Hans-Dieter |date=2017-07-03 |language=de |trans-title=Ransom money: Hiding place identified}}</ref>)
* Macroeconomic studies of cash flows through the central bank<ref>{{Cite web |url=https://www.ecb.europa.eu/pub/pdf/scpops/ecb.op204.en.pdf |title=Modelling euro banknote quality in circulation |date=2017-12-01 |access-date=2023-01-13 |last1=Deinhammer |first1=Reinhard |publisher=[[European Central Bank]] |last2=Ladi |first2=Anna}}</ref>
* Statistical recording of the lifespan of banknotes by the central bank<ref>{{Cite web |url=https://7layer.net/what-can-be-gained-with-serial-number-reading/ |title=White Paper: What can be gained with Serial Number Reading? |date=2018-05-14 |access-date=2023-01-13 |last1=Leszczyszyn |first1=Antin |last2=Grindley |first2=Rebecca}}</ref>
* Tracking the (location-based) migration of individual banknotes using [[EuroBillTracker]] for [[euro banknotes]], [[Where's George?]] for [[United States dollar|US dollars]] and [[Where's Willy?]] for [[Canadian dollar]]s as a [[hobby]]
* Use of individual banknotes for sharing messages with recipients using the mobile app ''[[smill]]''.<ref>{{Cite web |url=https://banknote-solutions.koenig-bauer.com/en/digital-solutions/smilltm/ |title=Share digital messages on your banknote |access-date=2023-01-13 |website=[[Koenig & Bauer]]}}</ref>

Since 2016, the [[People's Bank of China]] has requested the recording of banknotes issued and deposited at ATMs and bank counters, arguing that counterfeit money will be prosecuted.<ref>{{Cite web |url=http://www.pbc.gov.cn/english/130733/3881678/index.html |title=Yinfa No. 29 [2016], Notice of the People's Bank of China on Issuing the Guidelines on the Anti-Counterfeit Currency Work of Banking Financial Institutions |date=2016-02-08 |access-date=2023-01-13}}</ref> 

With Directive ECB/2010/14, the [[European Central Bank]] (ECB)  requires banks to check the [[security printing|authenticity]] of deposited and withdrawn banknotes at bank counters and ATMs using tested devices.  They are required to trace the origin of suspected counterfeit banknotes to the depositing account holder. They must also physically seize any counterfeit notes and coins.<ref>{{Cite web |url=https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32010D0014&from=DE |title=Decision of The European Central Bank of 16 September 2010 on the authenticity and fitness checking and recirculation of euro banknotes |date=2010-09-16 |access-date=2023-01-13 |website=European Central Bank}}</ref>