I connected payments to my website, and everything could be done online. For this, I needed a tax identification number and a scanned contract. There is a ready-made extension for WordPress, and I didn't encounter any problems when adding the payment page. Invoices are issued without any issues. You can send invoices through social networks and messengers. When one of my clients had a question about payment methods, support helped resolve it, but it took more time compared to other questions, apparently, it was not quite standard.
