When I get a bill I pay it right away - online. When I write a bill I have to wait for it as well. I do a lot of eBay selling and some of the people wait 8 weeks before they send the money. Terrible! And if they do not send it I am stuck with the eBay commission since it is to late to cancel the sale.
Lets see how much I can make here - if I am lucky I might stop selling on eBay :-)
Have a great day!!