Delaware Code
Subchapter III. Voluntary Acknowledgement of Paternity
§ 8-303. Denial of paternity.

A presumed father may sign a denial of his paternity. The denial is valid only if:

(1) An acknowledgment of paternity signed, or otherwise authenticated, by another man is filed pursuant to § 8-305 of this title;
(2) The denial is in a record, and is signed, or otherwise authenticated, under penalty of perjury; and
(3) The presumed father has not previously:

(i) Acknowledged his paternity, unless the previous acknowledgment has been rescinded pursuant to § 8-307 of this title or successfully challenged pursuant to § 8-308 of this title; or
(ii) Been adjudicated to be the father of the child.