Hi Marcus,
As a Freelancer myself, I use PayPal to bill clients. I also receive payments from them through some online platforms I self publish on. In addition, I use them when using Airbnb since if I have any issues with bookings, they are the quickest method Airbnb uses to get you your money back ironically.

Question: What other payments provider do you use to bill clients with, send invoices, etc.?
Thanks 😊