what sort of card do you leave after you have done a residential job? a card and an envelope to post or just a slip of paper?my current way is to leave a laminated card saying i have cleaned the windows and details on where to send the cheque to with a blank envelopeI've pretty much ran out of my old cards now and am after some new ideas, I want to try and get some custys to pay via a bank transfer which i want written on my new slips. seems expensive to have some new ones printed off professionally