You can now put a Guest Customer order on hold, resume it and then process it without the order creating a blank contact. All you have to do is click Clear Contact after resuming an on-hold order in the POS. You can access the Clear Contact button under the contact's name in the upper right of your screen:
The order will then be processed under Guest Customer which will ensure your contact database, list builder exports and reports don't have blank contacts.
Previously, Guest Customer orders placed on hold converted to No Name orders, creating a blank contact record in your database.