A relative asks you to guarantee a loan. The monthly payment looks manageable, and you trust them. Before judging whether you can help, establish what the guarantee would require from you if the arrangement went wrong.
Trust and contractual responsibility answer different questions. Australia’s Moneysmart guide to going guarantor explains that a guarantor may have to repay the debt and could lose an asset pledged as security. The exact position depends on the agreement and local law.
Ask for the boundary in writing
Request the complete proposed documents, not a summary relayed by the borrower. Ask whether your responsibility is limited to a specified amount, whether interest and costs sit inside that limit, and whether the guarantee covers only this borrowing. Do not assume a number mentioned in conversation is the contractual maximum.
For an illustrative discussion, “I can afford to help with three instalments” is very different from “I can repay the entire outstanding balance”. Write down your actual financial limit before somebody else’s repayment plan becomes the centre of the conversation.
- What event would allow the lender to seek payment from you?
- Which asset, if any, would secure your obligation?
- What must happen before the guarantee is released?
- Would a later loan change require your agreement?
Keep the review independent
Have a qualified adviser explain the documents and the consequences for your own circumstances. Allow time to consider the answer away from the signing meeting. An urgent deadline does not make unclear wording less important.
Also consider your future borrowing and ordinary household commitments. A guarantee can affect more than today’s bank balance. You can care about the borrower and still decline an obligation you cannot safely understand or afford.

