1. Introduce Refund days for Subs/Lifetime, copy default from product db. 2. Calculate refund date based on point 1 during Subs creations. = Purchase date + Refund days. 3. Introduce "Day Before Refund date" condition for alerts. 4. Introduce New email trigger for this condition. 5. Create new Email alert & Template for this condition. 6. Email should be sent similar to renewal email but instead against the refund date. (Mail function) 7. Also create email event in backend "email_refund" 8. Integrate with profile Alert management 9. Update inbuild data with Refund periods & Subs from Product inbuilt database.