Offer your thoughts or opinion on the input financial query or topic using your financial background.

Can a US bank prevent you from making early payments to the principal on a home mortgage?
Are there any known laws explicitly allowing or preventing this   behavior? It's not the laws, it's what's in the note - the mortgage contract. I read my mortgage contracts very carefully to ensure that there's no prepayment penalty and that extra funds are applied to the principal. However, it doesn't have to be like that, and in older mortgages - many times it's not like that. Banks don't have to allow things that are not explicitly agreed upon in the contract. To the best of my knowledge there's no law requiring banks to allow what your friend wants.