Missouri Revised Statutes Title XXVI. Trade and Commerce § 408.365. Acceleration clauses, repossession or confession of judgment by power of attorney, right of entry to repossess and waiver of damages from repossession provisions, prohibited

(1) A power of attorney is given to confess judgment, or an assignment of wages is given;

(2) The seller or holder of the contract or other person acting on his behalf is given authority to enter upon the buyer's premises unlawfully or to commit any breach of the peace in the repossession of goods;

(3) The buyer waives any right of action against the seller or holder of the contract or other person acting on his behalf, as the buyer's agent in the collection of payments under the contract or in the repossession of goods; or

(4) The buyer executes a power of attorney appointing the seller or holder of the contract, or other person acting on his behalf, as the buyer's agent in collection of payments under the contract or in the repossession of goods.