You fill out IRS form 12277 and mail it in to the address specified. You don't need the lien number; include as much info as you have when you fill the form. They'll file a notice of withdrawal and send it to you. You then send that notice of withdrawal in a dispute to the three credit bureaus.
If there is a judgment or lien on your credit report and that judgment has been satisfied, you must contact the credit reporting agency in writing and include copies of the documents that support your position, for example, a copy of the signed warrant to satisfy judgment.
We would like to release the lien in respect of the below mentioned units pledged in our favour by the Investor, and we therefore, request you to kindly release the lien marked on the below mentioned units.
You can dispute the item with the credit bureaus, and/or creditors or debt collectors, and they'll make a decision as to whether to remove it. You can do this on your own, or with the help of a credit repair professional (including possibly an attorney).