Ala. Code § 26-17-637: Binding Effect of Determination of Parentage.

(a) Except as otherwise provided in subsection (b), a determination of parentage is binding on:

(1) all signatories to an acknowledgement as provided in Article 3; and

(2) all parties to an adjudication by a court acting under circumstances that satisfy the jurisdictional requirements of Section 30-3A-201.

(b) A child is not bound by a determination of parentage under this chapter unless the child was a party or was represented in the proceeding determining parentage by a guardian ad litem.

(c) In a proceeding to dissolve a marriage, the court is deemed to have made an adjudication of the parentage of a child if the court acts under circumstances that satisfy the jurisdictional requirements of Section 30-3A-201, and the final order expressly identifies a child as a “child of the marriage,” “issue of the marriage,” or similar words indicating that the husband is the father of the child.

(d) Except as otherwise provided in subsection (b), a determination of parentage may be a defense in a subsequent proceeding seeking to adjudicate parentage by an individual who was not a party to the earlier proceeding.

(e) A party to an adjudication of paternity may challenge the adjudication only under law of this state relating to appeal, vacation of judgments, or other judicial review including proceedings under Section 26-17A-1.