If you need to specify whether additional handling fees have been prepaid for Royal Mail International Non-Personal Correspondence services, you can do so by adding the "Additional Handling Fees Prepaid" enhancement to a shipment using a supported service:
This enhancement is available on the following services:
WG4
LLH
IG1
MTK
DG4
BXF
BXC
BXB
BZW
BZX
WE1
MP1
MP4
IE1
MP7
MP8
HVB
HVE
HVK
HVL
DE4
DW1
MPR
BZU
BYD
BYH
DE6
If you encounter any issues, please feel free to contact our support team. You can call us on 0117 403 4313 (UK) / +1 (629) 666-6726 (US) or reach us online here.