Generally, it can be directly signed to indicate that it has been read.

To sign, that is, to write one's name, especially to express agreement, recognition, responsibility or obligation. At present, there are more interpretations of signatures, such as digital signatures and artistic signatures. Or a star's meaningful signature, also called signature. Signature is a kind of signature, because the signature is used the most, so the signature is often corrupted into a signature. Traditionally, signature is not synonymous with signature. The signature should be readable, but the signature is unnecessary. People have certain requirements for signature, and the signature represents the consent, which has legal effect and gives the document authenticity in law.