The overhaul of Thorn Group's business has already cost it its chief executive and now it is the board's turn for renewal. The company announced yesterday that chair David Foster will retire next week.The company had already announced that directors Belinda Gibson and Andrew Stevens would retire "on an orderly basis".Former Aristocrat Leisure chief executive Paul Oneile has joined the board as an independent non-executive director. Oneile is chair of A2B Australia (formerly Cabcharge). The Thorn Group board started a strategic review of the business in April, in the wake of a string of regulatory and legal problems and weaker business performance.In August, chief executive Tim Luce announced his resignation, saying he would work through the strategic review and recruitment of his replacement before leaving.Last month, the company agreed to pay A$25 million to settle a class action over a claim that its "Rent Try $1 Buy" promotion was misleading and deceptive.The settlement was the latest in a series of payouts by Thorn to in response to issues with its business practices.In January last year, Thorn Australia agreed to refund or write off $6.1 million of default fees and charges relating to 60,000 leases, after its was found to have contravened responsible lending rules.The company also agreed to refund $13.8 million of excess lease payments.ASIC said that between 2012 and 2015 Thorn had a flawed credit assessment process in place. It failed to make reasonable inquiries about each consumer's financial situation and failed to take reasonable steps to verify each customer's financial situation.In May last year the Federal Court ordered Thorn to pay a $2 million fine.Then in May this year, an independent expert's report prepared by Deloitte identified several areas in Thorn's credit assessment process that needed further "enhancement", including its dispute management, risk management strategy and suitability assessment policies.