knock on the door - if they are get the payment ,
if they not in post a stamped address envolope with 2nd class stamp on with the invoice sticking out the top through the door - make sure you put payment terms of 7 days on the invoice - Ive been doing it this way for years and years . you get the odd few send it later that 7 days but 99% get it to you before the next clean so you know where you are.
you can get 2nd class stamps by the 100 - i found by getting 1st class i wasns gaing much as i only tend to bank them once a week anyway so the saving was better in my pocket.
Its nice to come home with a pile of money siting on the mat
