| UNKNOWN | Unknown error occurred. | 0 |
| INTERNAL ERROR | Internal error occurred. | 5 |
| PACKAGE SIZE TOO LARGE | Package is too big to be delivered. | 10 |
| INVALID PACKAGE SIZE | Provided package size is invalid. | 15 |
| NO DRIVERS AVAILABLE | No drivers available. | 20 |
| INVALID DELIVERY DATA | Provided data is not valid. | 25 |
| OUTSIDE DELIVERY AREA | Pickup or drop off location is outside delivery zone. | 30 |
| TOO MANY PACKAGES | Too many packages within a delivery job. | 40 |
| DELIVERY ADDRESS NOT RECOGNIZED | Delivery address is not recognized. | 50 |
| PICKUP ADDRESS NOT RECOGNIZED | Pickup address is not recognized. | 60 |
| UNKNOWN DELIVERY JOB | Job with provided ID not found of doesn't exist. | 70 |
| CONTACT DATA INVALID | Invalid contact person data. | 80 |
| INVALID COORDINATES | Provided coordinates is not valid. | 90 |
| TIME NOT ALLOWED | Pickup or delivery time is not allowed. | 100 |
| PAYMENT DECLINED | Payment declined. | 110 |
| DUPLICATE JOB | Delivery job already exists. | 120 |
| CANNOT TRAVEL TO DELIVERY | Drop off locations is not reachable. | 130 |
| CANNOT CANCEL | Cancel is not possible. | 140 |
| DATE FORMAT ERROR | Invalid date format. | 150 |
| CONFIGURATION ERROR | Delivery system settings misconfigured | 160 |
| PARTNER_UNAVAILABLE | Communication with partner not established | 170 |
