Foreclosure law firms in Colorado are under the microscope, the Denver Post claims.

The publication says the Colorado Attorney General is investigating to determine if firms specializing in foreclosures regularly inflate their fees, costing homeowners more money in the process of trying to avoid foreclosure.

Law firms pay as little as $25 for someone to post official notices on a property advising homeowners of their rights, but some then charge as much as $150 in the bills they file with the public trustee overseeing the foreclosure case, according to details contained in four lawsuits the attorney general’s office filed against the law firms.