Well, you can - you can have a policy that forces payments from a select group. Some users will complain when "No, you cant pay with 2 chickens every 3rd full moon", but that is too bad.
Of course you then have to be willing to turn down money/customers. As someone who has worked for quite large traditional companies, we've ended up not buying from certain companies because they couldn't invoice us like we wanted to be invoiced.
