You may have your signature scanned by AMS for a $25 fee. Once your signature is scanned and encoded in the proper format, A-T-F can print that signature on your checks automatically.

To have your signature scanned, call (405) 340-0697 and request a signature scanning form from a customer support representative.  You will need to sign the form with the appropriate signature (three times) and then mail that along with payment information to AMS.  Once that is received, the digital signature will be created and sent back to you either via email (if a valid email address is on file) or mailed to you on a CD.  Turn around time is normally 7-10 business days. 
Once you receive the file, you will copy it into the payer's directory (the file name is payer.sig).