I looked at your document and couldn't find anything about how to include a "Void after 90 days" instruction on our checks??? (our Bank says to place it above the signature(s) ). does the UCC (or your software) agree? do you have any suggestions?we're already using the "Memo" space.

You can follow this guide to add a new text field on check
https://www.halfpricesof...are/print_void_check.asp 

Please scan your signature with white background. If you still this issue, it is some problem with the scanner.

You can also create a signature with Paint.

How to Create Digital Signature Image File with Paint - with video guide
http://www.halfpricesoft...signature-with-paint.asp 

Thank you.

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