Notifications for Credit Card Charges failure

Summary: Notifications for Credit card charges activated following 22D Quarterly patches is not sending emails to users of the credit cards

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Functionality above was enabled and tested (using the override email functionality) and worked perfectly in all tests. Subsequently promoted to Prod, where the first run sent out less than 1% of the expected emails to users. Functionality switched off and search began for a fix - to no avail, Decided to re-enable functionality and re-test in the hope that initial run was a "blip".

Retested in dev environment using override email - Success