Are you sure you're calculating the reimbursement correctly since this is an ARM?
Let's say your finance charge reimbursement is $1500, 180 month amortization and 60 months to the first change date.
1500 / 180 = 8.33 x 60 = 499.80 reimbursement due.
For a $25,000 reimbursement that had to be one heck of an error.
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The opinions expressed are mine and they are not to be taken as legal advice.