before they buy
Blacklist buyers by email, domain, IP, IP range, ASN, ISP, city or country, then see exactly why every blocked attempt was stopped.
Blacklist, your way
Add a single email or domain to the blacklist, or cut off an entire IP range, ASN, ISP, city, or country in one rule. Built into checkout, no third-party tools required.
Every block, logged
Every rejected checkout attempt is logged with the exact reason, IP address, email and location, so nothing gets blocked without an explanation.
Block by email
Blacklist a specific buyer's email and they can't check out again.
Block by domain
Reject an entire email domain, not just one address.
Block by IP or CIDR range
Block a single IP, or an entire range, before it becomes a pattern.
Block by ASN or ISP
Cut off an entire network provider known for abuse, not just one IP.
Block by city or country
Restrict checkout by location, down to the city.
Block from any order
Blacklist a customer straight from their order, and a matching rule is created automatically.
Enforced instantly
Blacklist rules apply the moment they're saved, no delay.
Full audit trail
Every blocked attempt is logged with the reason, IP, email and location, so you know exactly why.
Built into checkout
No plugins or third-party fraud tools, blacklisting is native to Komerza.
Frequently asked questions
Still stuck on something? Talk to us.
Risky orders are identified before they are approved, and every chargeback and fraud signal is tracked alongside the transaction it belongs to, so disputes are handled from the same place as the order.
No. It is included on every plan with no per-transaction charge. Some platforms bill fraud screening per transaction and charge separately for each dispute; Komerza does not.
The point of screening before approval is to stop the orders that would become chargebacks while letting genuine customers through. Every decision is visible in your dashboard, so you can see what was blocked and why.