Learning library
Go beyond provider features. Learn how the legal, financial, technical, and operational pieces fit together.
13 practical guides · primary sourcesStart with responsibility. Then follow the money.
Begin with Merchant of Record versus direct payments, learn the payment lifecycle and fee stack, then move into the operational topics that matter for your business model.
Open the payments glossary →Foundations
Understand the entities, money movement, responsibility boundary, and vocabulary.
How an online payment actually moves
Follow a payment from checkout through authorization, capture, settlement, payout, refund, and possible dispute.
Read guide → 8 minute readMerchant of Record vs payment processor
Understand who is the legal seller, which responsibilities move, and why the fee comparison is not one-to-one.
Read guide → 10 minute readThe anatomy of a payment fee
Understand percentage, fixed, cross-border, FX, billing, dispute, refund, payout, and platform costs without trusting one headline rate.
Read guide →Operations
Run refunds, disputes, payouts, subscriptions, tax workflows, and reconciliation.
Operating subscription billing
Plan subscription states, invoices, prorations, payment retries, entitlements, customer changes, cancellation, and reporting.
Read guide → 9 minute readPayouts, reserves, and payment cash flow
Understand why recorded sales, available provider balance, and money in the bank are three different numbers.
Read guide → 10 minute readRefunds, disputes, and chargebacks
Design the policy, evidence, support, accounting, and product controls around payment reversals.
Read guide → 12 minute readSales tax and VAT when you sell directly
Understand the operational chain from determining where a sale is taxable through registration, calculation, evidence, filing, remittance, and audit support.
Read guide → 9 minute readWhat you still handle with direct payments
A responsibility checklist for businesses that remain the merchant while using a processor, wallet, gateway, or acquirer.
Read guide →Growth
Improve checkout, add payment methods, and sell across currencies and markets.
Choosing checkout and payment methods
Balance conversion, recurring support, geography, operational cost, fraud, refunds, and implementation complexity.
Read guide → 11 minute readInternational payments and currencies
Separate seller coverage, buyer reach, presentment currency, settlement currency, payment methods, tax, authentication, and FX.
Read guide →Risk and resilience
Plan for compliance, reserves, provider dependence, and a future exit.
Payment security, PCI DSS, and authentication
Understand outsourced checkout scope, card-data exposure, script security, strong customer authentication, fraud controls, and operational ownership.
Read guide → 12 minute readPlan your payment-provider exit before entry
Evaluate data exports, payment credentials, subscriptions, event history, tax evidence, entitlements, webhooks, contracts, and cutover options.
Read guide →Migration
Preserve customer and subscription state when the stack changes.
Read what went wrong—and what worked.
Curated founder accounts, Reddit discussions, and engineering posts expose onboarding, reserve, migration, support, and chargeback questions that official feature pages rarely show.
Browse stories from the field