Legal Signature

Does any body know where I can find out if it is legal
to use a stamped personal signiture on the med and tx
sheets back page?
I know they are considered legal
for depositing or cashing checks. Since it is an original
copy of your signiture, I would think it would be authentic.
But you still would sign off daily with your initials using
pen. I have heard that some facilities don't even need
the staff to sign each sheet monthly.

I would like to know how other facilities have staff signatures
and how often and since we don't do electronic medical
forms---anybody out there that does---how do you sign
your med sheets, notes, etc? Especially in Indiana and
Illinois.

Thanks