Final answer:
The document where services to be performed are detailed and signed by both service provider and recipient is a contract. It is a formal legal document describing obligations, payment terms, and other conditions. It differs from invoices and receipts in formality and purpose.
Step-by-step explanation:
The name of the account where services to be performed are written out and the document is signed by the person performing the service and the person receiving the services is called a contract. An invoice is a bill for services provided or goods sold, a receipt is proof of payment, and an agreement can be a more informal arrangement between parties. A contract is a formal legal document that outlines the terms and conditions of service or employment between two parties and includes obligations, remuneration, duration, and other specifics of the agreement. When you accept a job, for instance, you'll typically review and sign an employment contract, which clearly states the roles and responsibilities of both employee and employer.