<prompt> Human: About a year ago, I filed for ch. 7 bankruptcy, and everything was discharged.A few days ago I went and checked my credit score, because Ive been working very, very hard to rebuild my credit. However, suddenly my score has gone down, and it shows a collection on my report. I have no other collection reports ever, and this feels like a huge blow.The amount box is blank, and in the remarks it says contested by bankruptcy. It says the Assessed date is May 2017. I looked into it, and it is a rental I had 2 years ago. I have no idea how I supposedly owe them money. I clearly remember doing a walkthrough with the manager, and they said everything looked good and I didnt owe any money. I never received a single call or letter, and this collection never showed on my report before. Even if I dont owe them the money due to the bankruptcy, I seriously dont want a collection on my report. Id be happy to pay them if it would remove this from my report. Its bad enough that I had a bankruptcy, but now it shows a collection. Not to mention Im sure this is going to make me look even less attractive for future rentals. Is there anything I can do at this point to get it removed?Tl;dr have discharged bankruptcy, collection from 2 years ago that I never knew about just appeared on credit report and says contested by bankruptcy, and I really want it off my report. Assistant: Is the whole bankruptcy process done now? Id probably talk to whatever bankruptcy lawyer you used. But likely you can dispute it on the grounds that all debts were discharged. You may have to go back to court to get it formally done. Its probably easier to just dispute it, and if they fight it tell them youre taking it to court and its getting discharged, theyll likely drop it when they realize they cant get anything out of you, especially if they knew you were in bankruptcy.Human: Thanks for your reply! Yeah the bankruptcy is done. How would I go about disputing it? Would I contact the collections agency? Or would I dispute it with the credit agency? Assistant: Collections agency. Ask them to prove that the debt is yours. You may need to send them a copy of the discharge paperwork.Human: Thank you! Is it generally better to do this via call or do I send them a letter?  <response>: In writing always. 