There are quite a few denominations that like to hedge their bets when it comes to declaring their view on the basis of the final judgment, and any link to active membership of their own denomination. On one hand, they will publicly repeat what the Bible says about that so that they appear to agree with mainstream Christian doctrine. On the other hand, they will so instruct their baptized members that there is no doubt in their minds that to leave that denomination, or drift into inactivity so that they are not doing what the denomination requires by the time of the Day of Judgment will see Jesus cast them aside.
The problem is getting them to openly admit to the general public that they have this stance. Any attempt on a public forum like this to name them could result in censure, either of the people answering, or of the site itself. One site was thus closed down a few years ago because it allowed freedom to "name and shame" and to argue on-line. In today's Western society there is far less freedom to say what one thinks, especially when it comes to religion and morals. But perhaps you live in a country where the slow stranglehold over freedom of speech has not yet become a noticeable grip (to those who disagree with the anonymous proponents of modern morality and views, that is.)
To answer this question, I just want to give a quotation. This one is specific, without naming any particular group but is clear enough to show that more than just one denomination fits the bill. It comes from a previous century yet is totally up-to-date still.
"Sacerdotalism would make salvation to be found only in the Church and
by means of its sacraments administered by its priests. At this time... the doctrine has been applied to
...many other systems. Nothing is taught
more clearly and insistently by the Lord and the Apostles than that
the sinner’s salvation is by faith in the Son of God, in His atoning
death and resurrection. A church or circle which claims that in it
alone salvation is to be found; men who arrogate to themselves the
power of admission to or exclusion from the Kingdom of God; sacraments
or forms that are made into necessary means of salvation, give rise to
tyrannies that bring untold miseries on mankind and obscure the true
way of salvation that Christ has opened to all men through faith in
Him” The Pilgrim Church, p30-32, E.H. Broadbent (Pickering Classic,
That quotation can be seen to apply to some mainstream groups. The point of it is this - the minute anything additional to faith in the finished work of Jesus Christ is tacked on to a religious system claiming to lead people in the way of salvation, the leaders are effectively claiming that you need to be led by them to receive the benefits of salvation. The logic seems to be, "As only Jesus can save you, and we are representatives appointed by Christ, you must follow us and receive from us all that is necessary to your salvation." And there is the link made to that denomination (their leaders, that is) and salvation.
Different denominations that do not practice sacerdotalism can find other reasons to present to their members why they must loyally do what the leaders require them to do, to be sure of (eventual) salvation. That usually includes accepting unquestioningly their interpretations of the Bible, and the regulations they place on members if they are not to be put out. (For, to be put out before the Day of Judgment will result in Jesus casting them aside as 'goats'). A key point to look out for is any group insisting that members must keep on doing what is required of them (by the leaders, who always claim that's based on the Bible) as salvation can be 'lost' or never be assured until they've passed some final loyalty or 'works' test.
It's often only when a member tries to leave a denomination fitting the description you ask about that they discover it is, indeed, fitting that bill. For sure, "Most things in life are easier to get into than out of." Never more-so than with this matter.