Tenant wants to part of rent late without Late Fee

[James Nix]

Hi everyone, was wondering what would you do in this situation renting to a tenant in one of your units. Rent is $755 & she has never paid rent late. (4 months of payments) 

This is the text message: 

Hey Jimmy, I hope you had a wonderful week.
I’m contacting you to let you know that I was able to (literally) scrape up 737. For this month’s rent & was wondering if I can send you over that tonight & have the $18 at a later date without having a late fee or vacate notice?