You are presented with an Affidavit and the signer has already signed the document. You should: Refuse to complete the notarization because it must be signed in the notary's presence? or Have the person swear or affirm the signature is theirs, check the signer's ID then complete the Affidavit's Jurat certificate? or Have the signer cross out his signature and initial the change then sign again in front of you? or Cross through the Jurat certificate on the document and attach a loose certificate to the original document