Robert, most properties train leasing personnel that follow-up with Prospects is vital and necessary. I once had a Leasing Professional contact a potential Resident every day until he finally came in to rent and sign a lease.
It almost bordered on stalking, I told her. (It worked for her that time, but I don't encourage that ... though I asked him later and he said she was just so darn cute trying to get her first lease he couldn't let her down. Turns out he was a great Resident!) Anyway, you have to start with a complete contact list, usually obtained from the Guest Card. Always ask the Prospect how he wants to be contacted. Some people going through or THINKING about divorcing their spouse will not want you to call them at home or send them mail.
After a Prospect leaves your property, you need to think about why he did not apply then. It could be that the Prospect is looking to move in three or four months and you told him you have no idea what will be available that far out; or, you had nothing to show in that floor plan; or, pricing was higher than what he wanted. For me, I want the Leasing Professional to understand and analyze reasons "people did not lease" and then this is what I teach:
1. Write a thank you note and mail it immediately (to be received in a couple of days)
2. Send an email/text with some piece of info you "forgot to mention" within an hour (if possible)or a "Thanks for stopping by XYZ Apartments."
3. If you haven't heard from the Prospect by the time they said they "would let you know" then call them!
And here is where it gets tricky, I think. When you are new, sometimes you have not learned to "read" people's signals and body language during a tour. Buying signals occur throughout the tour: it's when they start arranging their furniture in the vacant apartment; when they want to see the exact location of "their" perfect apartment; when they begin discussing what great recipe they want to try out in this kitchen/oven; how their friends will love coming to spend time at the pool, etc. If you have received these definite tips the Prospect wants to live in your community, then you can keep following up with them until they lease (without being obnoxious). But I think you need to know your customer - understand that many Seniors will come kick the tires every month or so until they can commit because they may approach the move carefully, slowly (change is hard) and reverently, so you may need to stroke them for months. Many times, with these Prospects, I write short, friendly letters and talk about one of our common interests and enclose a card each time. By the time they rent, I can tell you almost everything about these new Residents!
One thing I feel to be true now, though, is that many of the Generation X & Y renters make up their minds pretty quickly and if they don't rent right away and you send them a text or email and get no response, I don't waste my time following up every day or week. Those renters usually, in my experience, will come right out and take an application and give a deposit or hold fee at my communities because they understand the apartment will be gone if they don't, plus they want to lease, move in and get on with their lives.
I would also advise you to check with your Manager or Regional trainers and marketing department on their specialized tips specific to your company.