that will never happen mate
Never say never :
especiially with the taxman.
When I first started out, my local tax office wanted me to get my customers to sign a reciept book confirming how much they have paid me including tips
I told them to get stuffed
I have not heard from them since.
Also the tips thing is a real rip-off, I have to declare all my tips yet I cannot claim for the christmas gifts I give my customers, unless it promotinal material like pens and so on.