13 Del. C. § 8-308: Challenge after expiration of period for rescission [Effective Dec. 6, 2026].

(a) After the period for rescission under § 8-307 of this title expires, but not later than 2 years after the effective date under § 8-304 of this title of an acknowledgment of parentage or denial of parentage, a signatory of the acknowledgment or denial may commence a proceeding to challenge the acknowledgment or denial only on the basis of fraud, duress, or material mistake of fact.

(b) A challenge to an acknowledgment of parentage or denial of parentage by an individual who was not a signatory to the acknowledgment or denial is governed by § 8-610 of this title.