Anon suggests caution.
There are no witness signatures or certification marks or seals, no apostille.
"For example, a document, signed by an affiant issuing an Affidavit, a principal giving a Power of Attorney, a witness, officially signing a form or a document before a Notary Public, is usually processed in two easy steps – obtaining authentication and apostilling the document."
https://www.apoling.com/document-apostille-for-italy/