Friendly Apology for Late Payment [Date] [NAME, COMPANY AND ADDRESS, ex. Tom Atkinson COMANY Inc. 14 Edith Street, Hackney West, ZIP POST CODE] Dear [NAME, ex. Tom Atkinson], Your letter arrived a few days ago and we must confess that this obligation completely slipped through the cracks. Needless to say, there is no excuse for this and we extend our sincerest apologies along with the attached check. Please accept our warmest regards and sincerest hope that all is well. We certainly look forward working with you again soon. Very truly yours, [YOUR NAME, ex. Tony Montana] [YOUR NAME, ex. Tony Montana] [YOUR NAME, ex. Tony Montana] [YOUR NAME, ex. Tony Montana]