Before you upload the document the officer asked you for, you need to enter information about it. In some cases, the document won’t have all the information that you need to enter.
In this case:
check your document carefully to make sure you haven’t missed anything
enter any of the information you have
fill out the missing fields as follows:
for the “Document Number,” enter “000000”
for the “Expiry Date,” select a date that’s one year later than the date of issue
If you’re asking for an extension to get a Police Certificate for your eTA application:
for the “Document name,” enter “Request for an extension”
for the “Country of issue,” choose your country of citizenship from the drop-down menu