When sending internationally you may notice that EORI numbers and IOSS numbers are required to allow carriers to accept and ship an order, as such, many platforms have put in place fields for this information to be filled out in.

Unleashed is a channel that does have these fields, but currently, it's not possible in their system for the EORI/IOSS number to be passed through to Shiptheory on a per order basis.

However, there are a few alternatives in Shiptheory that can still ensure the information is sent to you carriers;


The EORI number can be filled out in your Shiptheory Company settings, and will then be passed through automatically to carriers when required, this can be filled out here.


The IOSS number can also be filled out in your company settings and will then automatically apply and send out to carriers when needed:

However, you can also use the Shiptheory rules to update the IOSS on a more per order basis, this can be done in the "Update Shipment Details" option:

For more information on that, please see our guide: Using Shipping Rules to set IOSS and other tax numbers

If the ability to send the IOSS and EORI numbers from Unleashed to Shiptheory directly is still something you require, we suggest reaching out to Unleashed directly to raise this request.

If you have any questions on the Shiptheory side, please feel free to Contact Support.