QUOTE(JohnP @ May 11 2008, 08:03 PM)

While you are at the post office, if you have several more letters (Which likely you will) that will need to be sent Certified Mail with Return Receipt, ask them for a stack of both the green cards for the Return Receipt and the slips for the Certified Mail.
It is not too hard to fill these out properly and get them ready to go prior to going to the post office.
What I've been doing with my stacks - after writing out the letter, and including the Certified Mail Number, I address the envelope, and place the Certified Mail sticker on it. Then I prep the green card and paperclip the envelope, green card, and Certified Mail slip all together.
Print the letter when it's ready to go out sign it, make a copy, then retain the copy and mail the original. Seal the envelope, place the green return receipt card, and then go to the post office and pay for the CMRR and postage all at once, postage is usually less than the 41cents 42 cents nowsince the letter is so lightweight.
They endorse the slip for Certified mail, I retain that with the copy in my binder for my copies (which you may need at the end of the HIPPA program) and then when the green card comes back with their signature on it I attach that with the Certified Mail slip, and the copy of the letter with a paperclip in my binder.
I have everything in my binder, works well for me as far as keeping everything organized.
Send initial disputes to the CRA's by certified mail ONLY, without the "return receipt".