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Field notes

Banking & Payments Stack

The virtual card AP economics teardown

The rebate you were quoted isn't the rebate you'll earn. Rebate, interchange, and acceptance — the three numbers that decide whether virtual cards turn accounts payable into a revenue line, with the addressable-spend math laid out.

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Banking & Payments Stack

Which payment rail for which B2B flow, in 2026

There's no best rail — only the cheapest one that meets each flow. A per-flow framework across ACH, same-day ACH, RTP, FedNow, wire, and card, on cost, speed, limits, and reversibility.

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Payments Stack

Processor vs. network path: a payments teardown

Four entities touch every card transaction and each takes a slice — here's how a senior operator maps the path, tracks where every basis point goes, and picks the processor and pricing model that hold up at scale.

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Fraud & Risk

A payment fraud strategy guide for growth-stage fintech

The fraud mix flipped to first-party and synthetic identity, agentic commerce is breaking the chargeback model, and the fix is a layered, real-time defense that also survives sponsor-bank diligence.

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Payments Stack & Partnerships

How to choose a BIN sponsor in 2026

What changed after Synapse, the diligence areas examiners check, how to read a program agreement, and the questions that separate a good sponsor bank from an expensive mistake.

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Payment Data Commercialization

Your payment data is a revenue line you haven't turned on

Where the value hides in transaction data, the four monetization models, and how to do it without breaking privacy or trust — from someone who has built data businesses on the rails.

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Have a decision you're stuck on?

If you're facing a payments, fraud, or data decision and want senior operator judgment rather than a deck, book a working call.

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