Guest checkout, second email
Same person, same address, a different email the second time. No customer record ties the two orders together — Flow has nothing to match on.
address matchemails differ
Stop shipping the
same order twice.
Customers double-order more often than you notice — and Shopify Flow can't catch the worst case: guest checkouts with different emails and the same shipping address. DoubleCatch flags suspect pairs and holds fulfillment before anything ships.
No spam — one email when early access opens.
The duplicates your automations can't see
Shopify's fraud analysis scores payment fraud, not double purchases. Flow recipes only match logged-in customers with the same email. Everything else slips straight into fulfillment.
The impatient double-tap
Checkout felt stuck, so they ordered again. Two paid orders minutes apart — identical cart, identical address, both heading to fulfillment.
same cartminutes apart
Channel sync gone wrong
TikTok Shop, Walmart, or a payment callback creates the order twice. Merchants report these for years — the duplicates look like normal orders.
same order id upstreamsame everything
Trying to solve this with Flow first? We wrote up every workaround that exists — read the honest guide.
How DoubleCatch works
01
Every new order gets fingerprinted
Email, phone, and shipping address are normalized — casing, diacritics, abbreviations, unit numbers — into a comparable fingerprint the moment the order lands.
02
Compared against the last 72 hours
Fuzzy matching across the recent order window. Exact email, same phone, or a near-identical address — each signal scores, POS and subscription orders are excluded.
03
Suspects get tagged and held
Above the threshold, both orders are tagged and fulfillment is held. You review the pair side by side: merge, refund, or release in one click.
Be first in line
DoubleCatch is being built in the open and will be free while in beta. Leave your email and you'll get access before it hits the App Store.