One roommate moving out. The other is staying.

[Rami W.]

Hello all! First post here on BP. Great site! This is my first rental property and first tenant 30-day notice!

I have a 2/1 rented out and one of the roommates has given me 30-day notice. Just want to make sure i'm not forgetting anything. I am in CA.

Things to do:
-Reply to exiting tenant with pro-rated rent due and schedule time for key return/final rent collection.

-Give staying tenant rental applications to hand out for her new potential roommates?

-Anything else I am clearly forgetting?

Question: Do I have to immediately have my existing tenant sign a new lease until she finds a new roommate? Or should I wait for her to find a new roommate and have them both sign a new lease?

Thanks!