Robert Sinclair of the Association of Mortgage Intermediaries has warned brokers not to impersonate their clients when contacting lenders.
He said this can cost advisers their place on a panel or even their jobs when working for a firm.
Sinclair, who was speaking at FSE Manchester today, said: “Lenders have a problem with advisers impersonating their clients.
“It’s fine if the customer is with you and you have their authority, and it’s all done through a process where it’s validated, but please don’t ring a lender on your mobile, pretending to be your customer.
“People have been found out, and lost – not just their place on the panel – but their jobs from advisory firms.
“And rightly so.
“Do the job properly because that’s the way the customer gets best value, the lender gets best value, and you get the right terms at the back end of it.”