When signing a contract, the parties or entrusted agents should try not to leave a blank line between the signature and the contents of the contract, so as to avoid the damage to their own interests caused by the modification of the contract; If conditions permit, sign on every page of the contract.
If the parties conclude a contract in the form of a contract, the contract shall be established when both parties sign or seal it. Signing and sealing is the basic performance of the parties to the contract to reach an agreement, and it is also the substantive standard to determine the effectiveness of the contract. In economic communication, signing and sealing is the basic requirement stipulated by law, but there are no specific provisions on who can sign the contract, how to sign it and what matters should be paid attention to when signing the contract.