38 CFR §36.4325

In computing the indebtedness for the purpose of filing a claim for payment of a guaranty or for payment of an insured loss, or in the event of a transfer of the loan under § 36.4320(a), or other accounting to the Secretary, the holder shall not be entitled to treat repayments theretofore made as liquidated damages, or rentals, or otherwise than as payments on the indebtedness, notwithstanding any provision in the note, or mortgage, or otherwise, to the contrary.