yayloh has direct integration with Mondial Relay and entirely depends on your account setup. We require you to verify the credentials at your end first and confirm that the parameters of your account setup for return shipment label generation are set correctly. The required credentials are described below in more detail.
To set up Mondail Relay in yayloh, send the following information to support@yayloh.com :
Merchant_ID
Private Key
Example return shipping label
Carrier rules
Carrier rules Specification
Countries where we enable shipping label generation.
Countries where we block shipping label generation.
Note- Check the countries listed in your Mondail Relay account set up. yayloh will be able to generate shipping labels only for those countries.