What you said is not clear. I know what you mean. The company only stamped it but didn't sign it. Why don't you sign it? My answer is based on this premise.

A, the contract is valid, as long as the unit seal indicates that the unit agrees. The unit doesn't have to be signed by someone.

Second, about no date, you must mean that there is no date where the signature and seal are signed. In fact, there are many such contracts. It is believed that the contents of the contract and the contents related to the term of the contract will not affect the execution of the contract.

Third, because what you said is misleading, you think there are no contract terms, you think you didn't sign it, and so on. So there are all kinds of sayings upstairs.