Everything occured in Arizona. Found a credit card account from several years ago back in June 2007. I paid in full to the collection agency on my credit report (I have copy of the check from my bank, copy of the letter I sent indicating my intentions and certified mail receipt). Today I notice that another agency has posted the same account, same amount on my credit report. A call to the agency was met with intimidation tacits and promise to damage future plans that require credit check. Please share any advice on how to proceed.
Thank you!

