Sorry to return to a question raised in a couple of earlier threads, which suggested that following payment of a lump sum, if mortgage repayments were kept at their pre-capital repayment level then the term would reduce too. In response to a question from me on this issue, Clubman suggested 'You should put the instructions in writing to the lender that any overpayments are capital repayments. Some lenders, especially if not told explicitly, will simply lodge the additional money to your account as a credit but not reduce the outstanding capital balance thus giving you no benefit. Best to make sure by writing to the lender to make the instructions explicit.' I am drafting a letter to my bank to this effect, but suddenly realise I have no idea what lodging the money to my account as a credit actually means. Any explanation?