I'm a big advocate of thank you and gratitude letters, but sometimes, you need to write a letter about an unpleasant situation. Consumerist, a customer advocate blog, provides a lot of help and guidance along the complaint letter line. Recently, they posted a boiler plate letter to get you started. A well-written letter, rather than a rant, is more likely to get you the action you intend. Have you written complaint letters and had any success? Share your tips in the comments.
P.S. This story was brought to my attention by my friend Karen via text message. "Did you know your cat is on Consumerist?" It's cool; I publish my photos in Flickr under a CC license and they gave me credit. The system works. Also, my cat is super famous now.