The Trump administration's latest allegations of mortgage fraud have raised questions about a long-standing housing issue known as owner-occupancy mortgage fraud. But that type of fraud can be difficult to prove, experts say.

President Donald Trump announced in a Truth Social post on Monday night that he was removing Federal Reserve Governor Lisa Cook . He cited allegations made by Federal Housing Finance Agency Director Bill Pulte that Cook committed mortgage fraud by claiming homes in two different states as her primary residence at the same time.

Cook's attorney on Tuesday said Cook will file a lawsuit to challenge her removal.

"President Trump has no authority to remove Federal Reserve Governor Lisa Cook," the lawyer, Abbe Lowell, said in a statement.

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