one-time customers

 I can share some information that can help you with managing your one-time customers, @SG2005.

You can make those one time customers inactive in QuickBooks Online (QBO). It'll be removed from your lists and menus. However, all their invoices or transactions will still be available on reports. 

Here's how:

1. Go to the Sales menu and click on Customers. 
2. Select the customer's name to open their profile.
3. Click the dropdown next to Edit.
4. Select Make inactive and then confirm by selecting Yes, make inactive.

For more information about adding, editing, merging, or deleting customer profiles, check out this article: Add and manage customers in QuickBooks Online. 

Once you receive payments, here's how to record it in the account: Record invoice payments in QuickBooks Online. 

Let me know if you need further information with handling your one-time customers. I'm always here to assist. Have a great rest of the day!

Probably, set up a customer called "Retail Sale" or something like that, and use them when recording the sale.

You can also record sales receipts with no customer name at all, if desired.