When the installed capacity of enterprise certificates is too large, and the number of contracted apps is too large, reporting sensitive information of apps may lead to closure and the enterprise signature cannot be used. Due to the above reasons, the company signature may be cancelled at any time. Therefore, some professional platforms can only improve the stability of enterprise certificates through rare certificates and strict control of APP.
If you want to find a signature service provider to sign, generally speaking, corporate signatures on the market are charged monthly. It expires after one month. If you don't renew the fee and re-sign, the APP can't be used any more.