La. Stat. tit. 13 § 3722
Current with operative changes from the 2024 Third Special Legislative Session
When parol evidence is admissible under the provisions of R.S. 13:3721 the debt or liability of the deceased must be proved by the testimony of at least one creditable witness other than the claimant, and other corroborating circumstances.
La. R.S. § 13:3722