In real estate there should never be a time when you accept a client as being a past client. Considering someone a past client will cost you money in the end.
Past clients are actually your best business asset. They can be a great source for referrals and future business. You need to keep a good relationship with past clients so that you can continue to reap the benefits from your biggest asset.
Erase the phrase “past client” from your vocabulary. Once you are done doing business a client becomes a friend, a partner, and an asset for your business.