Signature has unique personal characteristics, and everyone's signature has certain stability and consistency. Compare the signature on the check with the signature sample obtained in advance to see if there is any similarity. You can pay attention to the features such as strokes, shapes and Lian Bi in the signature. You can also pay attention to the overall style and habits of signature, such as tilt angle, letter connection and so on. If the signature sample is consistent with the signature on the check, it can be preliminarily determined that the check is signed by myself.