The banks always conduct appraisals of a loan applicant's assets in underwriting before they ever issue a loan. Try getting a home loan or mortgage sometime. The banks agreed with the valuation to issue the loan. Where is the fraud here?
Yes and no. Because the area is a business, not residential, it follows different rules. Look up the rules for using your business as collateral on a business loan rather than your home. The value of the business (which is kinda irrelevant to the building) is what they see. And if Trump, who holds all the financial data, gives them bad numbers, how will they know otherwise? They agreed with the numbers Trump gave them because they felt he was honest.
In addition, none of the lenders are actually complaining about being defrauded.
As far as you know. Simply put, you and that guy there have no idea what is being discussed in the bank board rooms. Could be they want to wait for the criminal case to conclude before going after him in a civil case since a guilty verdict would strengthen their civil case while a not-guilty would weaken it.
It could be its not worth the hassle.
It could be language in the contract that triggers privately.
We simply do not know and may never know.