What documents do I need to bring for my Non O extension on marriage at CW?

To prepare for your Non O extension appointment at CW, ensure to update your bank book on the day of your appointment. Bring copies of the first page of your bank book and the page showing your current balance. Additionally, you will need your passport and the receipt received when you paid. It's advised to arrive early and gather a queue ticket at the front desk before heading to Section L2.