Even if there is no formal written or oral contract between parties, a promise to pay for services or materials may be implied by law. This is referred to as quantum meruit. To win on a claim for quantum meruit, one would need to prove that (1) the plaintiff provided to the defendant materials or services at the defendant’s request or with the acquiescence of the defendant, (2) that the materials or services had reasonable value and (3) that the defendant has failed and refused to pay the reasonable value of such materials or services despite the demands of plaintiff. County Asphalt Paving, Co. v. Mosley Constr., Inc., 239 S.W.3d 704, 410 (Mo. Ct. App. 2007). A suit may be appropriate when good or services are provided to another and the recipient of the goods or services is refusing to pay for their reasonable value. Contact with questions.