If you are using a bill, bank statement or government issued residency proof, the document has to be issued within the last 6 months, in coloured, clearly displaying your name, issue date, and residential address (non PO Box address).

Alternatively, you may use your ID (front and back) that has the address on it as the address proof.

 

On the email notification of the audit result, you should see the reason for the rejection and the most common issue is due to "uncleared documents" which indicates the uploaded image resolution is too small for the relevant department to see the details, or the image is cropped.