I have nt had to do candidate accounts and i have now completed all units just got a few oral questions to do from my assesor yey.....what are candidate accounts anyway,witness testomonies are for your evidence to say how you carried out activitys or tasks etc, my supervisor didnt do any of those for me tho, they can also be from parents too, eg, if you have helped settle their child into group and they were very pleased with your approach etc....hope this helps..