Home ownership is a part of achieving the American dream. For many, the only thing standing between them and owning a home is a low credit score. Lenders rely heavily on FICO Scores when determining whether to fund a mortgage — low credit scores equate to high risk. Still, it isn’t impossible to get a mortgage with a low credit score.

A credit bureau gathers information about how consumers use credit. In other words, they collect information from as many consumer financial transactions or inquiries as they can. They then sell access to that combined information to anyone who has a legally-recognized reason (permissible purpose).

According to Experian.com, an unpaid tax lien will most definitely affect your credit score negatively. How much, however, varies since Experian notes that it depends on an individual’s overall track record of paying bills on time. The important thing is to find ways to get the IRS lien paid before considering options you have that can remove a current or old and paid lien from your credit score.

A credit bureau is an information clearinghouse that compiles information on consumers. The credit grantors, or lenders, report consumer payment history to the credit bureaus. The credit bureaus then compile that information together with information on tax liens, bankruptcies, and court judgments that is available in public records. In return, when consumers apply for credit, lenders can check credit reports to determine the creditworthiness of consumers.

If you find errors or inaccuracies in your credit history file, you will have to submit a dispute letter or request to each of the credit bureaus on which the mistake appears. In some cases you may be able to dispute the error with online forms, but in some cases you’ll have to submit a letter with your corroborating documents.