Notify a declined payment gently
When to use: Use it as your opening message when you have spotted a declined charge on their account.
Response
Hi customer name, nothing urgent -- I just wanted to flag that the last charge for plan or item did not go through. This happens all the time, usually a card expiring or a routine bank check, so let us sort it in a minute.
The amount was amount. You are talking to a real person, and I can walk you through next action right now if that is easiest.
If they sound worried
Honestly, there is nothing to worry about -- your account is safe and nothing has been cancelled. A single declined charge is normal, and I am here to make fixing it quick and painless.
Why it works
It names the failure plainly but strips out the blame, treats a decline as the routine event it usually is, and offers to act immediately -- which keeps an awkward money moment from turning into a defensive one.