The contract seal is a special seal, which is used to confirm the authenticity and validity of the contract when it is signed. According to the relevant provisions of the Contract Law of People's Republic of China (PRC), signing a contract must meet the formal requirements, including the need to affix the official seal, contract seal and other seals on the contract. If the electronic version of the contract seal is taken away by an unauthorized person, it cannot be proved that the contract has been confirmed and authorized by the relevant parties, so it cannot have legal effect.

In order to protect one's rights and ensure the validity of the contract, it is suggested to choose a regular notary office for notarization or use reliable methods such as electronic signature for authentication when signing the contract. At the same time, when using the electronic version of the contract seal, the corresponding authority and safety measures should be properly kept and set to avoid illegal use by others. If it is found that the electronic version of the contract seal has been stolen or abused by others, it should take timely action to safeguard its legitimate rights and interests.