[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Company name]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
I am writing to wish you a very happy 10th wedding anniversary. I apologize for sending these wishes a bit late, as I know you already celebrated your anniversary a week ago. I hope you had a wonderful and relaxing anniversary celebration with your children.
Let's try to get together within the next couple of weeks so we can have a belated dinner to celebrate your anniversary. Please call or email me so we can make some plans. Again, we wish you a very happy anniversary (a little late), and we hope that the years ahead are just as happy for you and your family.
Sincerely,
[Signature]
[Sender's first and last names]