So we have caught and reported a few double brokers over the last year.
The problem is if you catch them and report them, they could target your MC/DOT number next!
We have a contact at the FMCSA who warned us of this trend. This does not preclude info like email and contact phone number from being hacked and changed on carrier vetting websites but this trend has been picked up by the FMCSA.
The last one we caught, the FMCSA warned us to pay attention to our authorities for changes because this particular scammer has a tendency to try and use the reporters numbers as their next fraud target. So Beware