Insights · Page 2 of 10

The LILPE Blog

Payments, compliance, and merchant onboarding — explained by the team building LILPE's payment orchestration platform.

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Cover for a developer guide to storing money amounts with minor units and correct rounding

How to Store Money in Code and Databases: Minor Units, Rounding and Currencies

Floating-point numbers can't represent most money amounts exactly, and payment bugs follow. Why integers in minor units (paise, cents) are the standard, how many decimals each currency really has, how to split and round without losing a paisa, how to convert currencies, and how to format amounts for Indian and international customers.

9 October 2026 · 8 min read

Engineering

Exactly-Once Payment Processing: Outboxes, Retries and Idempotent Consumers

No network can promise to deliver a message exactly once, yet a payment system must act on each event exactly once. How that's achieved in practice: at-least-once delivery plus idempotent processing, the dual-write problem and the transactional outbox that solves it, idempotent consumers, ordering, and how to test that it all survives crashes.

9 October 2026 · 8 min read

Cover for a guide comparing interchange plus plus and blended card processing pricing

Payments

Interchange++ vs Blended Pricing: How Card Processing Fees Are Built

Every card payment carries three layers of cost: interchange to the card issuer, scheme fees to the network, and the acquirer's margin. Blended, interchange plus and interchange plus plus pricing package those layers differently. What each model means, a worked comparison, where regulation caps interchange, how to read an IC++ statement and which model suits which business.

9 October 2026 · 6 min read

Cross-border

Local Acquiring Explained: When Processing Cards in the Customer's Country Helps

A card payment is domestic or cross-border depending on where the merchant is located and where the card was issued, and that label affects approval, cost and the customer's own fees. What local acquiring is, why it can help, why it isn't simply a matter of finding a foreign acquirer, how it applies to businesses selling into and out of India, and how to decide whether it's worth it.

9 October 2026 · 7 min read

Cover for an explainer on card BIN and IIN numbers and eight-digit BINs

Payments

What Is a BIN? Card BIN (IIN) Numbers, 8-Digit BINs and How Payments Use Them

The first digits of every card number identify the bank that issued it. That prefix, the BIN or IIN, tells payment systems the card's network, issuing bank, country and type, and it drives routing, pricing, fraud checks and checkout design. How a card number is structured, the move from six- to eight-digit BINs, what BIN data can and can't tell you, and the rules for handling it.

9 October 2026 · 6 min read

Cover for an explainer on the ISO 20022 payment messaging standard

Cross-border

ISO 20022 Explained: The Payment Message Standard, From pain.001 to camt.053

ISO 20022 is the messaging standard behind modern payment systems, from India's RTGS to Swift's cross-border payments, which completed their move away from MT messages in November 2025. What the standard is, how message names like pacs.008 work, the messages payments teams meet most, what changed from MT103, and what it means for businesses that send, receive and reconcile payments.

9 October 2026 · 7 min read

Cover for a guide to presentment currency, settlement currency and currency conversion in payments

Cross-border

Multi-Currency Payments: Presentment, Settlement and Where Currency Conversion Happens

Selling to customers abroad can involve three currencies in one payment: the one you price in, the one the customer's account is in, and the one you're paid in. Where the conversion happens decides who sets the rate and who pays the markup. Presentment and settlement currency, dynamic currency conversion and its rules, double conversion, refunds across exchange-rate moves, and a checklist.

9 October 2026 · 7 min read

Compliance

PCI DSS SAQ Types: How Your Checkout Design Sets Your Compliance Scope

Most merchants validate PCI DSS compliance with a self-assessment questionnaire, and which one applies depends mostly on how card details are collected. The SAQ types and who they fit, how redirect, iframe, JavaScript and API checkouts map to SAQ A, A-EP and D, the 2025 changes to SAQ A, and practical ways to keep card data, and compliance effort, out of your systems.

9 October 2026 · 8 min read

Payments

How Net Banking Payments Work: From Bank Redirect to Confirmation

Choose your bank, log in on its page, approve, and come back to the store: net banking looks simple, but several systems have to agree before an order is marked paid. The flow step by step, who does what, why net banking payments fail or get stuck with money debited, what customers and merchants should do, and how net banking compares with UPI and cards.

9 October 2026 · 7 min read

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