The client SHOULD NOT withdraw the funds - they need to have their RRSP provider complete T1-OVP so that it can come out tax free. They have not received the tax benefit of the contribution since it can’t be deducted. If they just withdraw it, it will be taxed again.
Once, way back at the dawn of time, when I worked with Revenue Canada -Taxation, we had a case come to Appeals where a person had deposited, withdrawn and moved and redeposited RRSP funds several times. By the time he was done, there was almost no money left. Someone finally appealed on his behalf and head office in Ottawa generously allowed the amount to be taxed only once…and refunded the remainder. But they didn’t need to do so…ah…clients who don’t listen.