<prompt> Human: So Ive been especially interested in my credit now that Im trying to get the ball rolling on buying a house. Ive got 20 of the asking price but my credit is horrid 558. Im working on improving this now, but my credit report is showing something concerning...I have a 500 debt with Convergent, stemming from Comcast?!?! Ive never had cable or internet. At all. Ever. I like to avoid bills altogether and have kept myself down to rent, car insurance, phone, electricity for the last 5 years. My bad score is from a 4500 student loan, a couple ER bills, and an outstanding balance on an old utility bill- all of which I am now forming my plan to pay off. So obviously, Im going to dispute it. I dont want to claim identity theft because I have a feeling that this may have been my mother using my name because she too has deplorable credit. She makes stupid decisions, but I love her and dont want her in trouble. So I figured I could dispute it based on the fact that I never lived at the address this may have been set under. Clearly, I still need to call to confirm that it WAS that address, and if it is, I have a few questions:1. Who should I contact first? The credit bureau? Collections agency? Or comcast?2. When disputing, which of those sources would I send my letter of dispute to?3. Would a notarized letter from the landlord of the property stating that I was never a tenant of the property suffice as proof that the debt is not mine?Any other advice would be much appreciated. Please refrain from encouraging me to take action against my mother. I would sooner demand that she pay for it than get her in trouble, but I know that having this dropped altogether would be more positive for my credit score than paying the balance. Thank you!  <response>: Before getting too exhaustive, slow down as I tell you an almost identical story.My girlfriend began to get harassed by a company that bought bad debt from...you guessed it...Comcast. This was interesting since she had never lived in a Comcast territory so obviously never had their service. Contacting Comcast directly was a difficult process, since her name wasnt in their system, none of her previous addresses matched and she didnt have an account number. However, after persistence and by tracing a bank routing number referenced in the debt collectors letter it was discovered that a real Comcast customer attempted to pay their bill using my GFs debit card number by accident or on purpose, we will never know but the bank declined since the verification number and expiration dates were wrong. How Comcast and their hired bloodhounds somehow connected a bad debit card number with a legitimate debt is beyond me, but after a few hours the matter was cleared up and most importantly the bad debt removed from her credit record. 