What documents do I need to bring to immigration for my COVID visa extension on May 3rd, and will I have to pay the fee again?

The post discusses a user's upcoming appointment at Thai immigration for a COVID visa extension and inquires about necessary documents and fee requirements. Responses indicate that the user should attend the appointment on May 3rd with their passport and the pale blue receipt from the initial application. There's no need to pay an additional fee, as the immigration office will grant an extension to total 60 days for the COVID extension.