Your instincts are correct. They are referring to the bank purchasing blanket wide portfolio coverage to cover gaps in coverage, i.e., you don't force place a private policy until your 45 day letter expires and if the customer had a NFIP policy that expired, then you would have a 15 day gap in coverage between the time the mortgagee protection expired on the NFIP policy and when you force placed the policy.
Since you ultimately have to force place a policy on behalf of the borrower, thus the borrower has to be a named insured on the policy, I have never seen a blanket policy able to do that.
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