Fannie Mae and Freddie Mac are working on newer and stricter rules for commercial lenders and brokers after recent mortgage fraud schemes came to light. The updated parameters could be rolled out as early as this summer, the Wall Street Journal reported.

The changes come after Freddie Mac announced new guidelines earlier this year. These changes are expected to cover a wide variety of areas as the latest real estate schemes have involved everything from doctored income statements to fake property sales at bloated prices.

Among the new requirements, lenders would have to “independently verify” borrowers’ financial information to confirm the borrowers have enough cash and verify their source of funds for apartment complexes and other multifamily properties, according to the outlet.

The new restrictions could also extend to the property itself by requiring lenders to complete an independent due diligence on the appraised value of a property and evaluate its financial performance.

The new system would further replace the prior rules that gave lenders more bandwidth in what verifications they wanted, allowing them to skip costly audits.