Container numbers have an official format, with a combination of 4 letters and 6-7 numbers, for example 'ABCD123456'. If you do not input the numbers in this format, you will receive an “invalid value” error.
In case your container number does not match with the standard official format, or you have your own container number, then you can add 4 letters in front of your numbers.
Example can be: "XXXX123456” or “ABCD123456”.
If you have any questions, please don't hesitate to reach out to our support team at support@move4u.com