Is it possible to configure multiple payment gateways for redundancy or to support different payment methods?

Unfortunately, GetzPAID does not support the configuration of multiple payment gateways for redundancy or to accommodate different payment methods.

How does GetzPAID handle payments with multiple payment methods within a single mandate or transaction?

No. In GetzPAID, each mandate or transaction is associated with one payment method and frequency; it does not support multiple payment methods within a single mandate or transaction.