Money Moral Dilemma: Should I tell my gas and electricity supplier I'm underpaying?

JayD

Well, firstly, I think the question should not exist.
The honest and correct thing to do is to of course contact them again - as often as it takes to get the situation rectified.
Secondly, if you think you will get away with underpaying them forever, you are probably kidding yourself.

So, unless you want a huge bill at some later date, when they find out without your input, I suggest you do the honest and correct thing as soon (or as often) as possible and try to negotiate a reasonable method of repaying them - while you have the moral high ground.