Clients interested in lending money to financially assist a family member should consider making an intrafamily loan. Here, we outline basic information.When I bought my first apartment, my sister and brother-in-law lent me part of the down payment. It's not common but it is acceptable. Just keep in mind, you MAY need to enforce the contract which means suing your relative. First, clarify what kind of funding you're discussing with your loved one. A loan to a family member or a friend is usually unsecured. The terms and conditions are undefined or hazy and demanding payback is difficult. Completed SBA loan application (SBA Form 5 or 5C). • Tax Information Authorization (IRS Form 4506T) for the applicant, principals and affiliates.