The new name will be reflected in all the transactions with which the payee is associated. If you decide that you need a different payee name for easier identification, just select the payee and click the Pencil icon on the lower left side of the window. If you ever change your mind and decide you want them back, just select the Show hidden check box on the lower right side of the Payee window.
They are just not displayed in the Payee window and do not appear as auto-complete suggestions when entering a payee name in your account register. Hidden payees are not deleted or removed from transactions. You can also select the check box in the Hidden column corresponding to the payee names. Simply select the payee and click the Minus icon at the lower left of the window. You can hide the payee that you no longer want to use.
If you are adding online payees for Bill Pay transactions, refer to this section. This payee will then appear as an auto-complete suggestion when adding transactions. Specify an appropriate name for the payee. On the Payee window, click the Plus icon on the lower left side of the window. You can add payees, rename them, merge similar payees, and hide the ones you no longer want to see in your auto-complete lists. The Payee window ( Quicken > Window > Payees & Rules) helps you manage your payees and also allows you to run quick payee reports.