Scanned Signature Cards

For those of you that scan your signature cards, what is your retention for the hardcopy? Also for those who scan, do you segregate sig cards for dormant accounts? I know this was a practice for harcopy cards however I'm thinking it may be an antiquated control due to employee access to other member information such as cleared checks, drivers license, etc., which all have the memebr's signature on them. Thanks for your input!--Kathie