One Jain identity a member carries between sanghs, and a QR that works at the door.

What it is

A single identity that belongs to the person rather than to one centre's records. A member who moves from one sangh to another, or belongs to two, is the same person to both — not a new record that has to be created and later deduplicated.

At the door

The pass carries a QR code a volunteer can scan to check someone in. Members who do not use a smartphone can be issued a printed card instead, which scans the same way. Check-in works without a network connection, because a temple hall is the worst possible place to discover the signal is poor.

What it is not

It is not a payment card, a membership card that proves dues are paid, or an identity document. It identifies a person to a sangh that already knows them. Whether a member is in good standing is a separate question the sangh answers, not something the pass asserts.

Privacy

The code is a random token, not a name, phone number or member number. Scanning it away from a sangh's own check-in screen reveals nothing. A centre sees only the members it already holds records for.