Yes. Signing a commission agreement is an act of entering into a civil contract. As long as both parties reach an agreement, the agreement can be signed. However, the conclusion of a contract generally requires meeting the following requirements:

1. Both parties to the agreement must be persons with capacity for civil conduct;

2. The intentions of both parties are true;

3. The compatibility does not violate the mandatory provisions of laws and administrative regulations.

Note: If the law has special provisions, it must comply with the special provisions to be valid. For example, both parties must have corresponding qualifications, etc.