Need, no. Should yes. Now, if they’ve been there 3 years and the place in good shape, I’d probably be generous on some terms, but perfectly clear. But the lease makes things clear to BOTH parties about what is expected.You can find many templates on line. I’d suggest looking at them and adopting one to your needs.Remember, it’s valid only if both sides sign it AND it’s not in violation of state or local laws. Also, most templates will include a clause that states something like, “if any part of this lease is found invalid, the rest will remain in effect”. Keep that, it can be important.I’m not a lawyer, and this is not legal advice.