This is seriously a huge issue. I have had three (3) clients that could NOT PAY and I'm fuming - I can't invoice them either. There are certain clients you need the money taken right then and there or they won't take and because of insurance purposes I have to as well.
I'd use Square but a couple clients pay via paypal; I'm going to have to look at another option for our services it looks like and ASAP. I have never been so distraught - this is a huge red mark against QB IMPO.