When digitally signing a document, what confirms to the recipient that the document has not been tampered with since signing?

Answer

The decrypted hash matching the newly generated hash

The recipient decrypts the hash using the sender's public key and then generates a new hash of the document; if these two hashes match, document integrity is confirmed.

When digitally signing a document, what confirms to the recipient that the document has not been tampered with since signing?
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