Candidates need to submit various documents as part of the Private pilot License (PPL) admission process. These commonly include proof of identity such as a passport or driver's license, educational certificates to demonstrate minimum educational qualifications, a valid Class 2 medical certificate issued by an aviation medical examiner confirming medical fitness, passport-sized photographs for identification purposes, and any additional forms or declarations specified by the aviation authority or flight school. It's essential for candidates to ensure they provide accurate and complete documentation to facilitate the admission process smoothly.