The concepts behind moving money.
Plain-English explainers on the payment rails, ledgering, compliance and operational patterns a platform needs to move money well. No jargon for its own sake — just the ideas, and how we build on them.
What is ACH?
The batch network that moves most US bank-to-bank money — how credits, debits and returns actually work.
ACH vs. wire transfer: what's the difference?
Both move money bank-to-bank — but speed, cost and reversibility make them very different tools.
What is RTP (real-time payments)?
Instant, always-on, and final — how real-time payments change what a payout can feel like.
What is a book transfer?
Money that never leaves the platform — instant, free, and still fully double-entry.
What are stablecoin payments (USDC)?
Dollar-pegged tokens that settle on-chain — and how they sit next to fiat rails in one ledger.
Double-entry accounting for software platforms
Why the 500-year-old accounting model is exactly right for a modern payments ledger.
What is an FBO account?
One bank account, many customers' money — held for their benefit and reconciled to the penny.
What are virtual accounts?
Give every customer their own account number on one real account — so inbound money self-attributes.
What is payment reconciliation?
Making your books and the bank agree — and why the best reconciliation is the kind you never run.
ACH return codes explained (R01, R02, R03…)
Why a payment came back — and why 'insufficient funds' and 'account closed' should be different branches in your code.
Idempotency keys in payment APIs
How to retry a payment after a timeout without ever sending it twice.
Webhooks for payments: delivery you can trust
How to get told the instant money moves — and be sure the notification is real and never lost.
Ready to build on it?
One API for payments, ledgering and compliance — white-labeled per vertical.
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