As far as I know the only churches that practice "confirmation" are those that baptize infants.
There is no Biblical basis for infant baptism. Belief coupled with repentance precedes baptism 100% of the time in the Bible.
The first recorded case of infant baptism occured about 75-100 years into early church history. There are no cases of infant baptism recorded in the Bible. This was not something the apostles taught nor advocated.
In response to the thread authors question, Catholics, Lutherans are among a few of the denominations that practice infant baptism and confirmation. I do not know which ones believe confirmation is required for salvation, but I do know that most of them teach that when an infant is baptized it becomes a believer.
Instead of "believe and be baptized" - it is "baptize so that you may believe." Personally, I believe they have it backwards, and I also have not met an infant who professed a belief in Christ, nor have I met one willing to repent of it's sinful life.
In my opinion, confirmation is a joke. And a bad one at that.