We have been scanning signature cards since 1997 and I don't think we have ever gotten rid of the originals. Part of the problem I believe is that we have no process in place to make sure we have good images of the signature cards. All the originals are kept in a central location, but I believe some, if not all, of our branches keep copies of signature cards (old habits are very hard to break), even though they all have access to the scanned images. Our other issue is that we have no process to monitor when the accounts are closed (at the central location) so that the cards can be pulled and marked for future destruction. Hence, everything is retained forever. . . .
I have not heard of a required retention time after the card has been scanned, but could make a case for still keeping the originals. Just as law enforcement doesn't always like photocopies of checks because there are details that can't be verified by a handwriting expert from a photocopy, the same would be true of a signature card.
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