Enum describing possible invoice errors.
| Enums | |
|---|---|
| 
 | Enum unspecified. | 
| 
 | The received error code is not known in this version. | 
| 
 | Cannot request invoices issued before 2019-01-01. | 
| 
 | Cannot request invoices for customer who doesn't receive invoices. | 
| 
 | Cannot request invoices for a non approved billing setup. | 
| 
 | Cannot request invoices for a billing setup that is not on monthly invoicing. | 
| 
 | Cannot request invoices for a non serving customer. |