Lenzcard

Insights

Notes from the ledger.

Practical writing on interchange, scheme fees and scheme reporting. Articles coming soon.

Interchange

The five most common interchange downgrades in GCC e-commerce

Late presentment, missing 3DS data and MCC mismatches account for most avoidable downgrades.

7 min read · Coming soon
Scheme fees

Reading a scheme invoice: a line-by-line guide

What billing events mean, how they are calculated and where errors usually hide.

11 min read · Coming soon
Reporting

QMR without the quarter-end scramble

How to structure data so quarterly Mastercard reporting builds itself.

6 min read · Coming soon
Profitability

Why blended MDR hides your worst merchants

A practical method for merchant-level P&L with full cost allocation.

8 min read · Coming soon
Issuing

Rewards economics for premium card portfolios

Balancing rewards cost, interchange income and scheme incentives.

9 min read · Coming soon
Reporting

Visa QOC: building a defensible audit trail

Validation checks every operating certificate should pass before submission.

5 min read · Coming soon

See every basis point.

A 30-minute walkthrough on your own fee structure. No slides.