CODCheck
Shopify app that scores cash-on-delivery orders for fraud risk and hides COD for risky buyers.
Founder/CTO
Read the full case study
The problem
Cash-on-delivery is popular in Romania, but a refused delivery costs the merchant courier fees both ways and often the goods themselves. Existing tools add friction with SMS or OTP, or only see data from one store.
What we built
CODCheck scores every COD order from 0 to 100 using a shared Romanian anti-fraud network, phone and email validity, order frequency, value and address signals. High-risk buyers see COD hidden at checkout or get held for review. No OTP, no SMS. GDPR-compliant cryptographic fingerprints instead of stored personal data. Shopify billing with Free, $5, $9 and $23 tiers. Real-time analytics and merchant-controlled block/allow lists.
Decisions that mattered
Shared anti-fraud network over store-only data
A single store cannot see enough fraud patterns. A network of Romanian merchants sharing hashed signals makes a new buyer's history visible without exposing personal data.
Hide COD at checkout instead of cancelling orders
Cancelling feels safer but kills a sale that might be real. Hiding the payment method pushes risky buyers to prepay, keeping the order if they convert while stopping the bad ones from choosing COD.
Cryptographic fingerprints over raw personal data
Storing names, phones and addresses would make us a data target and a GDPR headache. One-way hashes let us match buyers across merchants while staying clean and avoiding a data-controller audit.
Numbers
30–50%
fewer refused deliveries
0–100
risk score per order
5 min
setup time
Stack
Related work
Got a product that needs to go further?
Fixed-price scope in the first call. No discovery phase invoice.