Ala. Code § 26-17-308: Challenge After Expiration of Period for Rescission.

(a) After the period for rescission under Section 26-17-307 has expired, a signatory of an acknowledgment of paternity may commence a proceeding to challenge the acknowledgment only:

(1) on the basis of fraud, duress, or material mistake of fact; or

(2) in the same manner as provided in Section 26-17A-1.

(b) A party challenging an acknowledgment of paternity has the burden of proof.