call in a contract
(law) (a) Demanding payment on a contract. A seller, for example, may be entitled under the contract terms to demand payment at the time the goods are ready to ship. (b) Submitting a formal, usually written, notice to collect payment on a contract. A seller who has not received payment, for example, may send a written letter to the buyer demanding remittance of the funds owed–that is calling in the contract.