so i had a little blemish, and the company that i had the blemish with sold it to NCO to collect. NCO calls me, I pay off the entire amount on the spot, i ask them to send me a receipt so i can write a letter to the credit buereus, and it's been 60 days, still no receipt. anyone know them or have a contact number? what i have is 267-960-9429, when they called me, i gotta get my receipt, i paid them by check so i have proof that they cashed it. also, on my credit report it says i have a zero balance with them now and the original company so i know they are legit, i just need a receipt.