Write Down Who Fronted the Money: The Terms, the Repayment Date, and the Signature Line Before Anyone Pays

Most family money trouble starts with a payment that was made in a hurry. One sibling covers a bill, a repair, or a month of supplies, and everyone agrees to sort it out later. Later rarely arrives on its own. A short written record turns a loose promise into something everyone can check, and it is worth writing before the next payment goes out.

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Write the amount and what it covers

List each payment as a separate line with the date it was made, the amount, and the bill or item it paid for. Attach the receipt or statement if you have it. A total at the bottom is useful, but the separate lines are what let each sibling confirm the figures without taking anyone's word for them.

Name where the repayment comes from

Decide whether the money will come from Mom's own accounts, from a shared pot the siblings fund, or from each sibling's share. Check whether Mom's account and any bill-pay setup allow that kind of payment, and ask her bank how it handles reimbursements. The source of repayment matters more than the total, because a repayment with no source is just a promise.

Set the due date and the method

Write down when repayment is due and how it will be made, such as a transfer on a specific day of the month. If there is any interest or extra charge, state it in the agreement. If there is none, write that down too. Simple written terms are easier to keep than terms everyone remembers differently.

Read the basic loan terms first

The Consumer Financial Protection Bureau publishes plain-language material on what to look for in any loan, including repayment schedules and how interest is calculated. Read those public explanations before you write the terms, and use the sources page to find them. A sibling-to-family agreement is not a bank loan, but the same questions apply.

Sign, date, and keep a copy for each person

Each party should sign and date the agreement and keep a copy. Store the copies where they can be found later, not in a single phone or email folder. If the arrangement becomes complicated, the Missouri Bar's public pages can help you find a lawyer to review it. This checklist is a starting point, not legal advice, and it does not replace a professional review when the amounts or the family situation are large or unusual.