Error message
“SEKO API returned errors: Failed to create shipment. [EasyPost_Error: The request could not be understood by the server due to malformed syntax.]”
What this error means
This SEKO EasyPost error is usually caused by missing or invalid customer contact details.
Most commonly, the customer phone number is missing or does not contain the correct number of digits for the return country.
How to fix it
Open the RMA.
Review the customer’s contact details.
Add a phone number if one is missing.
If a phone number is already present, check it has the correct number of digits for the country.
For US returns, use a 10-digit phone number.
Regenerate the label from the RMA page.
Keywords
Carrier: SEKO
Provider: EasyPost
Error type: Missing or invalid customer phone number
Related terms: malformed syntax, EasyPost_Error, SEKO API, phone number, customer contact details