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Re:Secret Service Warns of Chip Card Scheme by ejo4041 on Thursday April 05, 2018 @05:20PM (#16768864)
I was under the impression this was used in case of a dispute, they could go back to the receipt to determine if it was your signature or not. Not sure how often that is actually used.

Apparently a lot of cards are dropping the requirement anyway. [1]

[1] - https://www.creditcards.com/credit-card-news/signatures-soon...

Re:Secret Service Warns of Chip Card Scheme by leesalminen on Thursday April 05, 2018 @05:47PM (#16769054)
That’s correct. This new policy from the card brands begins this month for EMV transactions. My customers are excited to reduce check out time by dropping the signature requirement.