PayFast for WooCommerce: troubleshooting

Practical fixes for the PayFast problems South African WooCommerce stores hit most. They apply to any PayFast plugin.

• PayFast payment successful but WooCommerce order still pending: how to fix it
• PayFast ITN invalid signature in WooCommerce: causes and fix
• PayFast salt passphrase: where to set it and how to fix a mismatch
• PayFast refunds in WooCommerce: dashboard refunds vs. refunding from the order
• PayFast ITN bad source IP behind Cloudflare: why it fails and how to fix it