[Month Day, Year]

Customer Service
[Company Name]
[Street Address of Company]
[City, ST Zip Code of Company]

Dear Sir or Madam:

I have recently ordered [Name of Product] from your [website/catalog/magazine/toll-free number...] on [Month Day, Year]. [Issue/Complaint about the product]. My order number is [order #]

To resolve the problem, I would like you to [Your proposed resolution].

Thank you for taking the time to read this letter. I have been a satisfied customer of your company for [time period] and this is the first time I have encountered a problem. If you need to contact me, you can reach me at [contact info].

Sincerely,

[Signature]

[Your Name]