If you haven't heard: Patreon Changed Banks - Lots of pledges are declining (Patreon)
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- Update your credit card to a different card
- Use PayPal if you aren't already
- Probably the easiest solution, contact your bank to let them know the Patreon charges aren't fraudulent; this should be a one time thing
Once you've done any of those, Patreon suggests that you just re-pledge at the same amount this month (if the pledge goes through successfully, they say that you will not be double charged. But if by some change you are, just contact me, as a creator I have a refund button!)
Also quite important to note, Patreon confirmed via Twitter that they no longer accept Prepaid Visa/Mastercard as a form of payment, so that could have a big impact for some people as well.

It looks as if a lot of my declines have resolved overnight (I just woke up for the day) but there are still 18 declined patrons. I'll send them all a private note directing them to this post in case they don't know they are declined...
Hopefully this little speed bump is quickly resolved!