Ark. Code Ann. § 4-58-109: Proof of assignment - Pleadings

The assignee of any instrument in writing made assignable by law, on bringing suit on any assigned paper, shall not be required to prove the assignment unless the defendant annexes to his or her answer an affidavit denying the assignment and stating in the affidavit that he or she verily believes that one (1) or more of the assignments on the instrument of writing was forged.