If the trademark application is in the name of an individual, you only need to use your normal signature. Never sign it clearly and beautifully, because the signature is for filing. If you can't sign it back in the future, you won't be able to go through the formalities, so just use your normal signature. No need to stamp in the name of an individual

The application in the name of a company only needs to be stamped with the official seal, and the official seal should not be pressed on the printed words, because the official seal should also be scanned and archived, and the application in the name of a company does not need to be signed.