This could be because the Post Code is not in the format expected by the DfE. Valid formats for the DfE are as below (where ‘A’ is alphabetic and ‘n’ is numeric):
Also valid are:
Sometimes it isn't immediately obvious when looking at the postcode on the front page of the student profile what is causing the error. Please click onto the cog next to address and edit to view the address in full.
If the postcode is entered in one of the formats above but you are still receiving an error do check for spaces before and after the postcode. You can see in the screenshot below there is a space at the end of the postcode which will cause the above census error. Once amended and saved the error should be removed.