Im picking up a 6m old cat that is already litter trained

[MerryBiglipsmas]

does that mean ill have no problems at my house?

doubt it, put a litter tray down, ive found all mine have been good but i dont know if the cat will be like a dog and mark its territory praps

Depends on the cat.

Something to watch for is her going into a corner - it's sometimes a sign that they need a wee. If she does, pick her up and put her into the tray - she'll hopefully get the hint.

We were told to put our new kitten in the litter tray as soon as we got him home so that he would know where it was. He's been as good as gold.