Upvote:3
In Argentina it is standard that everybody, locals included, are required to show their id when doing any card purchase, and it is common practice to write the number in the receipt. Even with chip-and-pin cards. This is so standard that for seniors to prove they are still alive and keep receiving their pension, it is enough for them to do one card purchase within the month.
I'm not sure how effective this is, but I would expect fraud in Argentina to be higher than in Europe/North America; so it's not surprising that some measures are taken. When my wife's wallet was lost/stolen in La Plata a few years ago, there were several attempts to use it at ATMs, but no purchase. For comparison, last year my wife's wallet was lost/stolen at Charles De Gaulle in Paris, and by the time we landed in Canada there were already several purchases made with her credit card.