Delaware Code
Subchapter II. Returns and Payment of Tax
§ 512. Signing of returns and other documents.

(a) Any return, declaration, statement or other document required to be made pursuant to this title or Title 4 shall be signed in accordance with rules or instructions prescribed by the Director. The fact that an individual's name is signed to a return, declaration, statement or other document shall be prima facie evidence for all purposes that such return, declaration, statement or other document was actually signed by such individual and that the individual signed the return with authority to do so on behalf of the taxpayer.
(b) The making or filing of any return, declaration, statement or other document, or copy thereof, required to be made or filed pursuant to this title or Title 4, including a copy of a federal return, shall constitute a certification by the person making or filing such return, declaration, statement or other document, or copy thereof, that the statements contained therein are true and that any copy filed is a true copy.
(c) The Director may require that any return or other writing required to be filed with respect to any tax imposed under authority of this title or Title 4 be signed by the maker of such return or writing under oath or affirmation, subject to the penalties of perjury.

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