Praying Zuhr after Jumu`ah is a bid`ah and a going astray, instituting a new way which Allah has not prescribed. We must not do this; we must beware of it and warn people against it

You can catch Friday prayer up with one rak`ah. If you catch up with the second rak`ah prayed with the imam, then you can pray it as Jumu`ah. If you catch up with a person who is making up the rak`ah that he missed and pray with him, then you should pray it as Zhuhr and not as Jumu`ah.