Mandate PO Box / Tax Identifier Number When Mandated by Destination
Mandate PO Box numbers when sending to Dubai or UAE, when using Royal Mail tracked services.
When posting to Brazil or Portugal you are required to Provide a Tax Reference Number, unless this box is filled you can't post the item
For Dubai / UAE, shipments requires a PO Box number.
If data is required, then it should be marked with asterisk and be mandatory.