6 guides & tools
How payment processing actually works.
Plain-language guides to fees, chargebacks, compliance and high-risk accounts — no sales pitch required.
Tools
Tools
Reference · Nacha Operating Rules
ACH return codes, R01–R85
What every return code means, how long the bank has to send it, and what to do next. Search by code or keyword.
Look up a codeGuides5 articles
Guides
- 01What Is a High-Risk Merchant Account?A plain-language guide to what makes a business "high-risk" and how high-risk merchant accounts work.3 sections
- 02Chargeback Prevention GuidePractical steps merchants can take to reduce chargebacks and respond to disputes effectively.3 sections
- 03Interchange Rates ExplainedHow interchange fees work, and why interchange-plus pricing is more transparent than a flat rate.3 sections
- 04PCI Compliance GuideWhat PCI DSS compliance means for merchants and how to stay compliant without an in-house security team.3 sections
- 05Merchant Account GlossaryPlain-language definitions for the payment processing terms merchants run into most.5 sections
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