payments Hold

Hi,

I have put a supplier on hold using "Hold From Payment" option at supplier level. Still I could do payments for that supplier. I came to know that we need to put the hold option at supplier site instead of supplier level. then only oracle will not allow payments in such cases. Is ithis understanding correct ? If yes, then what is the use of holds options available at supplier level ?

One more requirement is that, we need to put payments on hold if Invoice is not goods received. what is the possible option to do this, and at what level does this needs to be done (supplier or supplier site level), so as to put payment holds ?