International Payments

Hello! I am trying to look into the best way for our international customers to pay in installments. We are a non-profit group working in mental health practices so it is important that we create an easy solution. I looked into Klarna, Affirm and Afterpay but reviews seemed to be poor and I couldn’t confirm international access. Pay Pal is saying it may be up to 20 days before they can support us on set up as a non profit to add the Buy now Pay later option. Does anyone have any experience with this need?