Does a Christian have to believe in Hell? I do remember I've read somewhere that modern Christians are no longer required to believe in Hell. Like, it's optional. I've now googled but no such info appeared again. Therefore asking knowlegeable people here - which Church document says the Hell is optional if it is really so.
If you consider the words of Christ as authoritative for describing Christianity, I'd say "Ya." (See Matt. 5:22, 29, 30, 10:28, 18:9, 23:15, 33, etc.)

But of course, you can call yourself a Christian and believe whatever you want.  There don't seem to be any "Christianity police" regulating what people associate with the faith.



Of course, it is also possible to be a Christian and be ignorant of the doctrine of hell, which doesn't necessarily preclude you from being a Christian. (That actually seems to be the norm.)