Xero Error: The quantity value '-1' is invalid. Quantity must not be less than zero.


  • Vend for Mac or PC
  • Xero Integration 


Caused by a negative received amount entered for a product in a stock order when receiving the order.


Perform a stock return of the received stock and recreate the stock order. This time enter a 0 quantity received amount instead of a negative amount for that product.

Alternatively, you can account for the stock order manually in Xero by creating a purchase order.

Additional Information

Stock Returns

Create purchase orders in Xero