New rules by the Federal Housing Finance Agency, investigations by state regulators and class-action settlements now prohibit servicers from collecting commissions on such insurance policies, and the country's biggest brand-name banks have renounced the practice. The multimillion-dollar deals illustrate how regulators are still wrestling with messy banking practices more than six years after the housing market's collapse. Harwood collected more than $40 million last year on more than $200 million worth of insurance billed to homeowners, according to two people familiar with Nationstar's confidential sales pitch for the business but who spoke on condition of anonymity because they were not authorized to discuss it. Carrington executives denied that its obligation to deliver $21.25 million of commissions would in any way affect homeowners or mortgage investors, and noted that it is not subject to the finance agency rules because it services loans owned by private investors. In its Irish prospectus, however, Carrington warned that some regulators believe the commissions "may constitute an improper 'kickback'," and added: "Should any regulator decide to take action, we may be forced to pay restitution."