Orders and Transactions are related, but they are not the same thing.

Orders represent supporter bookings and purchase records.

An Order is created whenever a supporter books a Campaign or purchases tickets for an Event.

Orders may or may not result in a successful payment transaction.

Transactions represent payment and charge records.

A Transaction is created when a payment is successfully processed.

Because Campaign bookings are only charged after confirmation:

• An Order can exist without a Transaction.
• A confirmed payment will generate both an Order and a Transaction.

As a simple rule:

Orders track bookings.

Transactions track money.