H if its on the back of your invoices may be customers havent seen your offer?
Why not tell your customers or put a different leaflet with this info on?
I know if an invoice came through my door I wouldnt look on the back of it or if I did I wouldnt pay a lot of attention to it!!!
I have offered this to loads of new areas during my time and it has always been quite profitable.
Also lots of customers once they get to know and like you seem (in my opinion) to want to help you and enjoy passing your number on etc...
Why not tell your customers or put a different leaflet with this info on?
I know if an invoice came through my door I wouldnt look on the back of it or if I did I wouldnt pay a lot of attention to it!!!
I have offered this to loads of new areas during my time and it has always been quite profitable.
Also lots of customers once they get to know and like you seem (in my opinion) to want to help you and enjoy passing your number on etc...