Fill out, sign, and affix your official seal to the Notary certificate. The wording requirements for acknowledgment certificates vary from state to state.Download a notary acknowledgment form in PDF or Word format. A Washington notary acknowledgment form is used to officially authenticate a signature on a legal document. This 5-step guide will teach you how to notarize a document that requires an acknowledgement (the most common notarial act). A Washington DC notary acknowledgment form verifies that the signatures included on a document are valid. Below are general best practices for acknowledging gifts, as well as suggestions for how to acknowledge more complicated gift types. Use the samples below to develop or update acknowledgment language for your own use when thanking donors for gifts to your department or center. For an acknowledgment in a representative capacity: State of Washington. 300 Washington Avenue.