Notes receivable gives you the ability to set up and record notes and payments on sales of property. Once set up you will no longer need to manually calculate interest, realized and/or unrealized gains or losses, past due payments, or unpaid interest.
Notes receivable interfaces with General Ledger (to set up the notes and record the entries), Deposit entry (to record payment on notes), and Accounts Payable (to record insurance and taxes on the property).