Has anyone previous experience with HSBC merchant services seeking a guarantee on the possible risk of charge backs if the business closed. We had a busy period two week sales period about a month ago and they are now using this two week period as a peak months turnover figure and are looking for a guarantee from our bank for a sizable sum as the accounts don't show a balance to cover this in the balance sheet. They are proposing setting aside a large cash deposit as security. They said they will terminate the merchant services agreement if we don't comply so that would leave us stuck as we sell everything through our website. Has anyone ever experienced similar and worked out a solution?