Template 1
First failed payment notice
Subject
Action needed: payment for [Product] didn't go through
Body
Hi [First name], We tried to charge [amount] for your [plan] subscription on [date], but the payment didn't go through. This usually happens when a card expires or hits a limit — easy fix. Update your payment method here: [billing link] Your account is still fully active for now. If you've already updated your card, ignore this — we'll retry automatically. Questions? Just reply to this email. Best, [Your name] [Product] Support
When to use
First failure — friendly, assumes good intent, no urgency beyond updating the card.