1, the signature may be forged, resulting in a white note or debt:

A. The signature is in the middle of blank paper (unwilling to be in the middle), and there is a blank position on it that can be borrowed.

B, the signature is at the bottom of the white paper, which has enough fictional space.

2. It can't be forged, which leads to the debit note or the signature of the debit note: there is written paper and the handwriting can't form the debit note, the signature on the document, the top sign of the blank paper, and the top sign of the blank paper.

3, to prevent the signature from being fictitious IOUs IOUs: you can write: invite to sign XXX, XXX sign a gift.