An Indiana notary acknowledgment form is a legal document used to verify the authenticity of a signature on a particular document. When certain legal documents, such as contracts, deeds, powers of attorney, or affidavits, require notarization, the person signing the document (the "signer") must acknowledge their signature in the presence of a notary public.After the signer has acknowledged their signature in the presence of the notary, the notary public completes the acknowledgment form and sign