You cannot create an invoice without a customer number. This is true, even if you make a cash sale and do not have anything to record in a customer account.
To set up a cash customer
- In the Search box, enter Customer, and then choose the related link. 
- Create a new Customer card. On the Home tab, in the New group, choose New. 
- In the No. field, enter Cash, for example. 
- In the Name field, enter Cash Sale, for example. 
- On the Invoicing FastTab, fill in the Customer Posting Group and the Gen. Bus. Posting Group fields. 
Now you have set up a customer that contains sufficient information for invoicing.
|  Note | 
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| You may have chosen a posting group that is also used for domestic credit sales. If you want to maintain separate data on cash sales, for example, with a special sales or receivables account, you can set up an extra posting group for this purpose. You must enter a number for a receivables account for the posting group, even though the balance in this account will always be 0 after you post an invoice. | 
|  Tip | 
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| For more information about how to work with fields and columns, see Work with Data. For more information about how to find specific pages, see Search. | 





