In a letter I received when moving into a new apartment (which mostly covered standard move-in logistics) my landlord wrote that there would be a late fee imposed if rent was received more than 5 days late. In MA, it is illegal to charge these fees.
Of course, this statement about late fees was not in the lease agreement (I wouldn't have signed if it was!) and has only been mentioned once in this letter.
Should I be worried that this could be used against me to actually charge a late fee (by being considered a contract I implicitly accept by moving in)? Is there any legal reason for me to bring this up and get the landlord to formally acknowledge that they will not in fact charge illegal late fees?