Citizens Advice has seem a 40% increase in the number of guarantor loan problems that it has helped people with over the last year.

When taking out a guarantor loan the borrower gives the name of a guarantor, normally a friend or family member, who is then pursued for payment if the borrower can’t repay.

Last year Citizens Advice helped people with over 2,000 guarantor loan issues.  Between October and December 2016, it dealt with nearly 600 problems – a 40% rise compared with the same period in 2015 (400 problems).

This included cases where people were hit with debts totalling thousands of pounds after guaranteeing a loan that the borrower failed to repay. In many cases guarantors were not aware of the risks they faced should the borrower get into difficulty.

Citizens Advice helped one man who was asked by his daughter to guarantee a £2,000 loan she took out online. He told his daughter that he would, but wasn’t contacted by the firm to sign any paperwork and didn’t realise he would be liable if she missed repayments. When his daughter failed to make repayments, the man – who was unemployed – couldn’t afford to pay the debt off.

A woman also contacted Citizens Advice for help after her bank pursued her for payment for a loan taken out by her son’s ex partner. When she agreed to guarantee the loan, it was not explained to her that she would be liable if she failed to pay. She struggled to make the £300 monthly repayments on top of her other household bills.

Citizens Advice wants a requirement for all lenders to provide guarantors with a letter of agreement – so they understand what they are signing up for.

Gillian Guy, Citizens Advice chief executive, said: “Friends and relatives are unknowingly trapping themselves with enormous debts.

“Agreeing to guarantee a loan for someone else carries a big risk of being hit with an unexpected debt – but too often people are unaware of the danger they are placing themselves in.

“All potential guarantors should be given a written agreement so they know exactly what they could be expected to repay and when.

“The FCA’s measures to tackle payday loan problems have cleaned up the market significantly  – but other forms of high cost credit, such as guarantor loans, still pose a risk.

“Extending the payday loan cap on interest rates and fees across all high cost credit products would protect even more consumers.”