Every written contract, the foundation of the action, purporting to be executed by the party sought to be charged, his partner, agent or attorney-in-fact, is evidence of the existence of the debt or that the party undertook to perform the duty for which it was given and that it was made on sufficient consideration, but may be impeached by answer, and, when so impeached, the burden of proof is on the defendant.
Structure Code of Alabama
Chapter 21 - Evidence and Witnesses.
Article 1 - General Provisions.
Division 4 - Weight and Sufficiency.
Section 12-21-90 - Official Notice of Armed Forces Death.
Section 12-21-91 - Official Report of Person Missing, etc.; Presumption of Signer's Authority.
Section 12-21-92 - Secretary of State's Publication of Foreign Interest Rates.
Section 12-21-93 - Statutes of Other States and Territories.
Section 12-21-94 - Transcripts of Congressional Acts and Foreign Statutes.
Section 12-21-95 - Municipal Ordinances, Bylaws, and Resolutions.
Section 12-21-96 - Land Patents.
Section 12-21-98 - Certificates and Transcripts as Evidence of Land Title and Facts.
Section 12-21-99 - Recitals in Sheriff's Deed.
Section 12-21-100 - Judgments.
Section 12-21-101 - Certified Registers of Marriages, Births, and Deaths.
Section 12-21-102 - Copies of Letters Testamentary, Administration, and Guardianship.
Section 12-21-103 - Transcribed Records.
Section 12-21-104 - Copies of Required Official Bonds, etc., and Transcripts.
Section 12-21-106 - Official Entry on Paper as Evidence of Registry.
Section 12-21-107 - When Certified Copy Good Secondary Evidence.
Section 12-21-108 - Historical Works, etc., as Evidence of Facts of General Notoriety and Interest.
Section 12-21-110 - Receipts for Money.
Section 12-21-111 - Verified Itemized Statement as Evidence of Account's Correctness.
Section 12-21-112 - Written Contract as Evidence of Debt or Duty; Impeachment Thereof.