Using Memberstack 2.0? There is an updated version of this article here.
My member has a status of 'Past Due.' What does that mean?
The subscription’s status remains
active as long as automatic payments succeed.
If an automatic payment fails, the subscription is updated to
past_due and Stripe attempts to recover payment based on your retry rules. (You might want to double-check your retry settings.)
If payment recovery fails, you can set the subscription status to
unpaid, or you can leave it active.