XXXX XXXX called several times from an unknown number and said he was going to come to my place of work or home to serve me court papers if I did n't call NCR,XXXX I called the number got no answer the next day a block number called me saying he was XXXX XXXX from NCR. I called the number back a lady answered but only said hello no company name or anything, she seemed nervous. XXXX XXXX got on the phone and said he was trying to collect XXXX for a debt. After talking with XXXX at NCR several times he said he had no idea who this XXXX XXXX XXXX XXXX is. The XXXX time I spoke XXXX XXXX explaining to him that I spoke with the debtor and they gave me the name of the of the collection agency and it was not XXXX or National Check Resolution. I asked XXXX XXXX who they purchased my account from and he kept insisting the original debtor. I told him no, that I already spoke with them and I was waiting on the Collection Agency who they gave my account to return my call. XXXX got angry and said I had till XXXX XXXX XXXX to get back to him or the courier service would serve me! I said you told me you have no idea who the are?? He the hung up on me!