This is a new one for me. Here's my 2 cents worth:
1. The builder is not the borrower. The regulations require the borrower to obtain the flood insurance, or for the bank to force place the insurance if they do not. The borrower has not obtained flood insurance.
2. Have the agent file the corrective paperwork and obtain a copy showing the policy is being amended to show the proper owner of the policy.
IMO you cannot close the loan, much less fund it, until you can show the borrow has obtained flood insurance. BTW, for a new loan you cannot force place insurance in order to close the loan if the borrower refused to obtain flood insurance.
In the wake of what just happened with hurricane Katrina, now is not the time to be taking any chances, or taking short cuts with flood insurance requirements.
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The opinions expressed are mine and they are not to be taken as legal advice.