Code of Alabama
Chapter 5 - Actions or Proceedings Upon Public Works or Improvements Contracts Improperly Let or Executed.
Section 39-5-1 - Contracts Let in Violation of Law Unenforceable; Certificate of Compliance; Rebuttable Presumption of Compliance.

(a) No civil action shall be brought or maintained by a contractor in any court in this state to require any awarding authority to pay out public funds for work and labor done, for materials supplied, or on any account connected with performance of a contract for public works, if the contract was let or executed in violation of or contrary to this title or any other provision of law.
(b) The awarding authority shall, prior to the execution of final contracts and bonds, certify that the contract to be awarded is let in compliance with this title and all other applicable provisions of law; and, only for purposes of a civil action as referenced in subsection (a), the issuance of the certificate by the awarding authority shall constitute a presumption that the contract was let in accordance with the laws. The presumption may be rebutted only by a showing with clear and convincing evidence that the certification is false or fraudulent and that the contractor knew that the certification was false or fraudulent before execution of the contract.