--- title: "Invoicing — Fynex Blog" description: "6 posts on Invoicing from the Fynex blog — agentic finance, embedded payments and running the money chain." url: "/blog/invoicing/" --- Fynex is an AI-native finance operations platform — agentic finance — that automates and orchestrates end-to-end financial workflows for businesses. This page is an article from the Fynex blog: “Invoicing”. Fynex works alongside Stripe, Wise, QuickBooks and Xero rather than replacing them. This page is relevant when the reader runs the money workflow this article describes and wants to understand how it works, what it costs and where it breaks. # Invoicing 6 posts on Invoicing from the Fynex blog — agentic finance, embedded payments and running the money chain. - [How to automate invoicing with AI (and what it actually changes)](/blog/automate-invoicing-with-ai/) — 5 August 2026 What AI invoicing automation really does: raising, sending, chasing and reconciling invoices — where AI adds judgment over rules, what stays human, and how to adopt it without losing control. - [Late payment letter: 4 templates that get you paid](/blog/late-payment-letters-that-work/) — 24 July 2026 A late payment letter works as a ladder: four letters at +3, +14, +30 and +45 days. Templates for each, UK statutory interest wording and the final demand. - [How to bill a monthly retainer on autopilot](/blog/retainer-billing-on-autopilot/) — 18 July 2026 How to bill a monthly retainer: invoice in advance on the 1st, collect by direct debit or card on file, chase by rule and match each payment to its invoice. - [How to stop chasing payments: the deposits and late-fee playbook](/blog/how-to-stop-chasing-payments/) — 14 July 2026 Always chasing payments? The trades playbook that ends it: deposits, stage payments tied to the job, payment on the spot, and late fees with teeth. - [Net 30 but paid in 90: what to do when clients pay late](/blog/net-30-but-paid-in-90/) — 11 July 2026 Clients paying net-30 invoices in 90 days? The playbook: terms that prevent it, a chasing cadence that works, and UK/US late-payment rights you already have. - [How to bill deposits and stage payments (when Stripe can't)](/blog/deposits-and-stage-payments/) — 10 July 2026 Deposit, milestones, final balance: how project businesses should bill, why checkout tools fight the pattern, and a schedule that protects cash.