SEKO / EasyPost — Malformed Syntax
Error message
Error: SEKO API returned errors: Failed to create shipment. [EasyPost_Error: The request could not be understood by the server due to malformed syntax.]
Carrier: SEKO / EasyPost
What this means
This error is usually caused by a missing or invalid customer phone number.
How to fix
Open the RMA.
Review the customer contact information.
Confirm a phone number is present.
Ensure the phone number format is valid for the origin country.
Remove spaces or special characters if needed.
Regenerate the label.
If the issue continues
If the label still fails:
verify the number contains the correct number of digits
confirm the country code is valid
contact Support if needed