November 15, 2026

Web, Payments, Bytes & Ventures

Explainers: Visa

Diagram: an expired card is crossed out and a reissued orange card feeds a dark token vault at the card network, which links to the same network token and per-payment cryptogram stored by the merchant

Card payments · Oct 30

Network Tokenization Explained: Why a Saved Card Keeps Working

How network tokens replace a stored card number, survive a card reissue and what a merchant still has to check.

A card in a payment terminal linked by a dashed line to a long orange hold bar that shrinks to a short graphite final charge, which then posts to an account statement

Card payments · Oct 26

Authorization Hold Explained: Pending Card Charges

Why a card authorization hold reduces available funds, how it becomes a final charge and what reversals do.