AFAIR, there's no mention of witchiness or otherwise in the conditions, unless it's picked you up a conviction for theft or fraud along the way, in which case you've got a problem. I'd have thought that the biggest problem with witching and being a postie would be sleep deprivation from all those full moon ceremonies clashing with the 5am starts [1]

Rob.

[1] Vagueness and ignorance of witchism deliberate, he said, trying to avert a new thread...