in this case, if the contract has been actually performed, it will be deemed as valid, and both the signer and the fingerprinting person will be liable legally.

In judicial practice, the most prudent choice is the combination of signature and thumbprint. Signature is a natural expression of personal writing and a reflection of personal true meaning. However, there are cases where people do not recognize others to sign on their behalf after committing acts.

Although pressing fingerprints is not easy to identify, its role in determining identity can settle disputes at one stroke to some extent. Therefore, the combination of signature and pressing fingerprints can learn from each other's strengths and complement each other's weaknesses, which is a practical choice to avoid risks.