Check your PAN-linked account details on the CDSL Easi/Easiest portal
Check your PAN-linked account details on the NSDL IDeAS portal
Review emails and SMS from brokers, depositories, and DP accounts
Check old account opening forms, statements, and welcome kits
Log in to each stockbroker app or website you have used
Contact your Depository Participant and ask for all demat accounts linked to your PAN
Check your bank records for linked trading and demat account openings
Use the KYC Search facility on SEBI-registered platforms if available
Verify inactive or forgotten accounts by checking old broker names and merger records
Contact CDSL or NSDL customer support for guidance on PAN-based demat account tracking