The one time I did that I used PayPal. Otherwise I send a P.O. and get a check or wire transfer. It was a training course and each department wanted to pay for

The one time I did that I used PayPal. Otherwise I send a P.O. and get a check or wire transfer. It was a training course and each department wanted to pay for their own students. I made sure to let them know that I would be charging more, to cover the PayPal fees. They were fine with that. There was some paperwork to let PayPal know that I was a real company, but otherwise it wasn't a problem. The total was only about $2500, so rather less per transaction than what you are doing.