Is it resonable to ask for payment within 14 days after training received? It seems that most companies that i deal with are quite happy to sit on my invoices for 28 days or more and pay in their own good time. I changed the invoices to request payment within 14 days to try and speed up this process, but has had little difference and have quite a few payments outstanding now. How do i get them to pay up quicker. Your views and comments would be appreciated.