Dear Mr. Dan,
We wish to inform you that your subscription for the months of April, May, and June are still unpaid.
According to the Rules and Regulations of the club, membership may be cancelled if the subscriptions for three successive months are not paid. Please pay up by the end of the month, or you will cease to be a member of this club beginning next month.
If you have already sent your payment, please ignore this letter. Thank you.