[ Your Name Address Phone Number ]
[ Name of Receiver Title Company Name Address ]

29-Nov-XX
Dear [Name]
I am sorry that the check I sent you on March 15 (No. 567891-234) never arrived. Enclosed is a second check for $690.00 (No. 567991-256),which should cover the balance of our account. I apologize for this delay and for any inconvenience that the missing check may have caused you.

I appreciate the opportunity to do business with you and ask for your understanding.

Best regards,
[Your Name]