Of all the disputes covered on this site, this is the one people search for with the most hesitation. The legal answer is simple: a debt doesn't stop being a debt because of who owes it to you. The harder part is everything that comes after that answer.
The legal answer versus the real question
Small Claims Court doesn't distinguish between a stranger and a sibling — the same rules about proving a loan and pursuing repayment apply either way. What people are usually really asking is whether it's worth pursuing, given what it might cost the relationship. That's a question only you can answer, but it's worth separating clearly from the legal question, which has a straightforward answer.
Why these cases are often harder to prove
Loans between people who trust each other are often informal — no written agreement, sometimes not even a clear conversation about repayment terms. This doesn't mean the debt isn't real, but it does mean you may need to work harder to piece together evidence that a more formal, business-like loan would have generated automatically.
The evidence that often still exists
- E-transfer records or bank statements showing the money was actually sent.
- Text messages or emails referencing the loan, even casually.
- Any later message where the person acknowledges owing you money, even partially.
- A record of any partial repayments made.
The loan-versus-gift problem
The most common defence in these disputes is the claim that the money was a gift, not a loan. Whatever evidence you have suggesting an expectation of repayment — even an informal text saying "I'll pay you back" — becomes especially important here, since it directly counters this argument.
Why trying something short of a lawsuit matters even more here
Given the relationship at stake, a direct, calm conversation — or a clear, respectful written request — is worth attempting before ever considering a claim, more so than in most other disputes on this site. See the demand letter builder if a conversation alone hasn't worked.
Weighing the relationship honestly
Before filing, it's worth being honest with yourself about what the relationship is already like, and what pursuing a claim will likely do to it. For some people, the relationship is already effectively over and the money is what remains; for others, the relationship is worth more than the debt. Neither answer is wrong — but it's worth deciding deliberately rather than drifting into a claim out of frustration alone.
Where to go for the full framework
This piece is about the emotional dimension. For the practical framework on proving a loan and calculating what's owed, see unpaid invoices and loans.
Frequently asked questions
Do I need a written loan agreement to sue a family member?
No — a verbal agreement can still support a claim, though gathering whatever supporting evidence exists becomes more important without a written record.
What if they claim it was a gift, not a loan?
This is the most common defence in these disputes — any evidence suggesting an expectation of repayment helps counter it directly.
Is it worth trying to resolve this without going to court?
Given the relationship involved, this is generally worth attempting first — see the demand letter builder.
Related guides
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Unpaid invoices and loans
The practical framework for proving a loan and its amount.
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Personal loan recovery wizard
A guided walkthrough for organizing what you're owed.
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Demand letter builder
A calmer, documented way to raise the issue first.
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Do I have a claim?
Confirm the building blocks of a provable case.
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Suing a Client Who Won't Pay: A Small Business Owner's Guide
A business owner's approach to pursuing an unpaid invoice.
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Suing a Tenant for Unpaid Rent: A Landlord's Perspective
How a landlord can pursue unpaid rent after a tenancy ends.