1 month old This article is more than 1 month old Loans are backed by a relative or friend and have seen Amigo become UK’s most complained about financial firm Family members and friends have protested to the Financial Ombudsman that they did not agree to be a guarantor or were forced into doing so. Photograph: Dominic Lipinski/PA Family members and friends have protested to the Financial Ombudsman that they did not agree to be a guarantor or were forced into doing so. Photograph: Dominic Lipinski/PA Tue 2 Mar 2021 19.01 EST Last modified on Wed 3 Mar 2021 02.15 EST Complaints to the financial ombudsman about a type of high-cost loan where the debt is backed by a relative or friend have leapt by more than 3,000% in a year and are running at almost 800 a week.