Why a family loan must be in writing — and enforced

Canadian courts have turned an unenforced family loan into nothing, turned a disputed "gift" into a debt that had to be repaid, and held a father to a letter he signed calling $525,000 a gift. The difference, again and again, comes down to the paperwork. Here is what real cases teach about putting a loan in writing and acting on it.

When people lend money to family, two quiet assumptions cause most of the damage: "we don't need to write it down, we trust each other," and "I can always ask for it back later." Canadian courts have repeatedly shown why both assumptions are dangerous. The lesson isn't that loved ones can't be trusted — it's that memories drift, relationships change, and a court can only act on evidence. A written, signed agreement is that evidence. Enforcing it on time is what keeps it alive.

Lesson 1 — a loan you never enforce can be discounted to nothing

If you treat a loan like it doesn't really need to be repaid, a court may agree with you — and not in your favour. In Ontario family-property disputes, judges have looked at whether the lender ever genuinely treated the money as a debt: were there terms, was repayment ever sought, was anything ever paid back? Where a parent had advanced money but took no steps to enforce it and the borrower made no effort to repay, courts have discounted the alleged loan's value sharply — in some cases effectively to nil — when dividing property.

Lesson 2 — without paper, "loan" becomes "gift"

The most common family-money fight in Canadian courts is simple: one side says the money was a loan; the other says it was a gift. When money is transferred without documents, the law applies presumptions about gratuitous transfers, and the outcome can turn entirely on scraps of evidence — a text, an email, a note. The Supreme Court of Canada set the framework for these presumptions in Pecore v. Pecore, and lower courts apply it constantly to family loans.

Lesson 3 — what you sign is what counts

Paper cuts both ways. A court will hold you to what you sign — including a document you signed to help someone else, like the "gift letter" a mortgage lender asks for when family money goes toward a down payment.

What these cases have in common

Different families, different amounts — but the same pattern:

• The dispute was about intention, not whether the money changed hands. Everyone agreed money moved; they disagreed about what it meant.
• The outcome turned on evidence. A signed note, a written acknowledgement, a signed gift letter — these decided cases. Their absence created them.
• Timing mattered. A loan left unenforced for years was valued at nil, and a father who changed his story years after signing a gift letter couldn't undo it. Meanwhile, the limitation clock keeps running.
• Relationships had changed — a marriage breakdown, a family feud. The paperwork written in good times is what protected people in bad ones.

Common questions

Can a family loan become legally unenforceable if you never chase it?

Yes. Every province has a limitation period — two years from default in most provinces, six in PEI, Newfoundland and Labrador and the territories, three in Quebec — after which you lose the right to sue. Courts have also valued a parent's loan at nil when the parent never tried to collect it. Clear dates in writing, and acting when payments stop, protect your right to be repaid.

If I lend money to my child and they say it was a gift, who wins?

It depends on the evidence. For an adult child, the law starts by presuming the money wasn't a gift, so your child has to prove it was; only money given to a minor child is presumed to be a gift. A signed loan agreement, a promissory note or a written acknowledgement then usually settles it, as it did in Massaar v. Moneck.

Can signing a mortgage gift letter cost me the loan?

It can. In Klemensiewicz v. Klemens (2025), a father who had signed a letter calling $525,000 a "non-repayable gift" later said it was a loan, and the court held him to the letter. If the money is really a loan, don't sign a document that says otherwise: tell the mortgage lender the truth and put the real terms in a written loan agreement.

How to protect a family loan — practically

1. Put it in writing before the money moves — names, amount, whether it's a loan (not a gift), the repayment schedule, and any interest.
2. Both people sign it. A signature — including a valid electronic signature — is what turns "we discussed it" into "we agreed it."
3. Set a clear repayment date, so the limitation period is certain and you know when the loan is due.
4. Keep records of the transfer and any payments — e-transfer memos, receipts, messages.
5. If a payment is missed, follow up in writing. A signed written acknowledgement of the debt, or a part payment, restarts the limitation clock.

Every case above turned on proof. It's worth knowing a LendRight agreement is sealed with a SHA-256 fingerprint before anyone signs, so the exact document both people signed can be confirmed later and can't be quietly altered — see document integrity and the SHA-256 seal.

None of this means you should treat your family like adversaries. It means the opposite: a clear, signed agreement removes the ambiguity that creates adversaries. The families in these cases didn't end up in court because they wrote too much down — they ended up there because they wrote too little, too late, or wrote something other than what they meant.

This article is general information about Canadian law, not legal advice, and it is not a substitute for a lawyer. Court outcomes depend on their specific facts, and several of the cases discussed arose in family-property disputes. Case names and citations are provided so you can read the decisions yourself on CanLII. If your situation involves a large sum or a dispute, consult a licensed lawyer in your province.