12th March, 200..
While going through our accounts, our auditors have pointed out that a sum of US. 800/- for bill Nos. 117 and 201 is long overdue from you. As we have to close our accounts for the financial year ending 30th June, 200.., we shall feel much obliged if you will please let us have your Cheque for US. 800/- by return post.
We take this opportunity of thanking you once again of your patronage and assure you of our co-operation at all times.