Dear Uncle
Thank you for the Sonic electric toothbrush when we got married. Unfortunately I have just learned on the ten o'clock news, by e-mail and on You Tube that your business has gone under and you owe £20m approx. to people who paid you money in good faith for a certain service. Now I thought you were a bit dodgy when I was eight and you divorced my favourite auntie and we gave you the benefit of the doubt when you got caught re-labelling bottles of cheap Scotch as Jonnie Walker, we even showed some sympathy when your conservatory business went under owing large sums and you were banned from being a UK director. But enough is enough. Please desist from starting any other businesses in the UK, stop dragging the family name through the mud (my mother must be turning in her grave) and retire to your French 'retreat' preferably to do the decent thing with a loaded shotgun or using rope from one of the really expensive light fittings probably paid for using other people's money.
Yours sincerely
Your nephew.
P.S. I think it unlikely you will be too popular at any family soirees so would suggest you stay away.
P.P.S. Operating an advanced booking system without ring-fencing client monies and then spending it is pretty uncool.