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Configuration at magento backend
Firstly, admin need to configure the SagePay Payments extension at magento back end by clicking on Store > Configuration > Sales > Payment Methods > SagePay Payment Gateway.
Distinguishing between Authorize Only and Authorize Capture:
- Authorize only will check the card for validity but not charge the account until the order is approved and invoiced.
- Authorize and capture will charge the debit/credit card at the time of the order submission.
For Subscription Products
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