Hi @jameslongly
Of course - you can do just as you suggest - one invoice on a regular basis for bulk sales. In fact, we even have a tool that may help you simplify the process.
You may want to check out these two links:
I’ve also included a link below for merchant accounts, which may help with your card payment records:
I hope that helps, but please don’t hesitate to let us know if you have any further questions.