[Publib] electronic signature cards

[Val Stark]

I hope someone out there can help me.

We currently have a 3x5 index card each patron (or patron's parent/guardian) signs when they sign up for a library card acknowledging they are responsible for everything charged on the card until the library is notified of the loss of the card.  Unfortunately, 30,000 3x5 index cards take up a lot of space. With the advent of technology, and the credit/debit card industry, there are these wonderful little machines that let people slide their cards and sign on the machine. 

My questions:  Is there any library using something comparable?
Does any library have an electronic signature panel?
Has any library scanned all of their signature cards into their system?

We would still like to have access to the signatures.  We still compare signatures when there is a question if its the same patron when there are 2 with the same name, same birth date (large fine) claiming NOT to have a card but are both in our system.  

Any information on the brand, cost, or vendors used would be greatly appreciated.

Thanks in advance for any help!

Val Stark
Circulation Assistant
Quincy Public Library
526 Jersey Street
Quincy, IL 62301
vstark at quincylibrary.org