Can I submit a recommendation letter after the deadline?

<p>I’ve gotten all of the necessary components of my applications out to each school by the deadlines, but I was wondering if I could still submit a recommendation letter from someone who is not related to my school in any way. It would be a personal letter, and they just offered to send one after I told them where I was applying to. So since I’m not missing anything and my application is okay how it is, can I still have them send their recommendation letter to the schools I’m applying to? My schools are: Uconn, UVM, UNH (New Hampshire), URI, Quinnipiac, Penn State, and Villanova.</p>