This letter informs a company about a product which is being used improperly by customers and could leave the company open to litigation.
1234, Main Street
Boston, MA 02123
31 March, 2005
<Recipient Address Goes Here>
I have been a customer of <company name> for <time you've been a customer>. As such, I think I know how to properly use your products. I also know when they're being used incorrectly, and I think that is what is happening in <name of area or city>.
<company name> has treated me with nothing but courtesy and professionalism, so I would hate to see an injury due to misuse result in a lawsuit. If you wish to pursue this matter and need more information, feel free to contact me.
encl: <List of enclosed items goes here>