A shipper using Royal Mail services needs to acknowledge and accept Royal Mail's Terms and Conditions before their first label purchase. This can be accomplished either via the Shippo Web App, or through the Shippo API Portal.
Postal Service Act 2000 │ Royal Mail Group Ltd
Click & Drop™ Terms and Conditions
Rates for Royal Mail MCA will be sent as part of the POST /shipment response.
Note
Label Purchase will be blocked by Shippo until the terms have been accepted.
Once you have accepted the Terms and Conditions, proceed to Step 2: Create shipment.