It's not common but it is acceptable. Just keep in mind, you MAY need to enforce the contract which means suing your relative.When borrowing money from or loaning money to family and friends, make sure that your loan agreement addresses all the basic terms. It should specify a repayment term and payment schedule, an interest rate, and other contingencies, such as how late payments or a default will be handled. To get complete information about your loan(s) or contact information regarding your loan holder(s), login to your FSA account. You can use a legally binding and easy to fill out Loan Agreement, or a Promissory Note, to capture the details of your loan. Streamline your business loan process with our customizable agreement template. Ensure clear terms and secure business funding with confidence. Have you, a family member or close relative owned a small business before? Complete information will be necessary to process your application.