I need my existing hotel-booking site to collect a guest’s ID proof right at the moment they confirm a reservation. The flow should add a clean, mandatory field to the booking form that allows visitors to upload a scanned copy of their ID; no manual entry or alternative documents are required. Technical notes • Accept only JPEG or PNG files and show a clear error if anything else is attempted. • Client-side preview and basic size/format validation are a must before the file reaches the server. • Store each upload in a secure, timestamped folder tied to the booking reference and surface the link inside my admin dashboard for easy review. Done correctly, the new step should feel native to the current UI, work across desktop and mobile, and leave my existing payment/confirmation logic untouched.