EngineeringPayments2 min read
Idempotency is not optional in payments
A double-tap should never become a double-charge. How Collect makes payment endpoints safe to retry — by design, not by luck.
Paul Smith · May 12, 2026
Topic
Payments
1 article
1 article
A double-tap should never become a double-charge. How Collect makes payment endpoints safe to retry — by design, not by luck.