From Patreon: "A note about recent patron payment declines" (Patreon)

Forwarding this email I got to all of you just in case you find yourself in this position and how to fix it! Sorry about the trouble!

Hi there,

An issue with a payment partner is causing a slightly higher-than-normal number of your patron payments to be declined by their banks. We've traced the increased declines back to payments system upgrades required by one of our processing partners. Patrons might see some payments declined while changes take effect.

If a patron reaches out to you about a decline, you can advise them to follow these steps:

Contact their card issuer to confirm the charge is valid and retry that card

If the retry does not work, try a different payment method. Patrons can edit their payments in their Settings, under Billing History: