aster98

Hi,
Thanks for your reply, and sorry for the delay — I’ve been unwell.

Yes, by default WooCommerce doesn’t include a VAT ID (NIP) field. This field is added by a plugin that also generates invoices. The invoicing system I use is called wFirma (https://wfirma.pl), and the plugin for WordPress was developed by a Polish company called WP Desk: https://www.wpdesk.pl/sklep/wfirma-woocommerce/

This issue only occurs on one specific site: onlvnemarketingclub.pl. I use the same invoicing setup (wFirma + the WP Desk plugin) on other websites, and everything works fine there.

Here’s a screen recording showing the problem: I change the first name in an order, click save, but after refreshing the page, the changes are gone.
https://www.loom.com/share/725c22cc8b3e4b0c862265933992a025?sid=1a0d26c9-cc25-4005-8cd7-444e26fcbeae

I’ve also tested for plugin conflicts by disabling them one by one — unfortunately, that didn’t help either.

Thanks in advance for any suggestions!

Sorry, it was my mistake. It turns out that the coupon is applied. However, it doesn’t show in the order summary for the customer—it only applies the discount when the payment is processed from the card.

This is a subscription platform. The first day is a free trial, and the payment is charged after 24 hours. The coupons are set to give 40% commission per recurring order for the affiliate and a 10% discount for the customer.

It’s quite inconvenient that the discount doesn’t appear for the customer in the cart.