Simplified Manual #530, Chapter 65 again

I posted about this before, but I can't find the post, so I have to ask again. I have a mental block against that word. It is a bad form.

The sentence: When you use our lists, you have the assurance that your message is bing delivered to those merchants throughout the country who are ******* (looks like memmer) for your goods--and to nobody else.

Can somebody tell me again what that word is?