Cancelling v not taking it

<p>okay several threads are telling me if i signed up for 2 and i only want to take 1 : i can either not take it and it will be okay or i dont take it and all scores are cancelled</p>

<p>who is right??</p>

<p>technically just not taking the test isnt the same as cancelling it is it?
if you can substitute tests, then does it really matter if you take the amount you signed up for?</p>