In foreclosure litigation countless law firms entered into agreements with various parties to achieve the result of a foreclosure sale. They knew or MUST have known that the documents that they referenced or attached to their pleadings in court were either fabricated by them or their employees), or at their instruction, or fabricated by others. They knew or MUST have known that the "client" was not the Plaintiff/Claimant but they fraudulently continued acting as if the named Plaintiff both existed and had a valid claim.
Such actions among others are violations of the FDCPA. The banks suckered the lawyers into what appeared to be lucrative retainers to handle mass debt collection and foreclosure without disclosing the fact that with the retainer came liability for violation of multiple state and Federal laws.