My mom loaned a 'friend' some money a few years ago, which was supposed to be paid monthly. Since then the friend has been paying sporadically and they are now in a disagreement over what the interest for late payments was actually supposed to be applied to. The promissory note they signed says:
"If the undersigned misses a payment then interest will accrue at a rate of 3% per month, with subsequent payments paying the arrears before being applied to the current month's payment."
We are located in BC, Canada. Does anyone know how this should be read?