How to start/stop recurring payments going into catch up mode
There can be a multiple reasons that a Recurring Payment is suspended, such as credit card has expired or a donor has requested a period to suspend their donations.
In the Payments2Us package you have the option for any outstanding payments in arrears to be paid once the Recurring Payment is active again, or to not.
Activating this workflow will stop catch up payments occuring. If  inactive, then the recurring processor will charge until all payments are caught up.