Candidates must present several documents during the NEET UG counseling and admission process. These typically include the NEET admit card, NEET scorecard or result, Class 10 certificate (for date of birth verification), Class 12 mark sheet and passing certificate, valid photo identity proof, passport-size photographs, category certificate if applicable (SC/ST/OBC/EWS), domicile certificate for state quota seats, and PwD certificate if applicable. Candidates must carry both original documents and photocopies for verification.