There are some on here who seem to believe in a very non-biblical and very dangerous teaching of post-death salvation. This is a damnable heresy from the enemy, which is giving people a false hope into a false belief and security, that after humans die, they might get a "second chance" to hear the Gospel of salvation, and get themselves saved. This is a LIE from the devil himself, and must be rejected as such. I will give some reasons from the Word of God, which I hope will shed some light on this subject.
Firstly, Hebrews 9:27 says very clearly, "And as it is appointed unto men once to die, but after this the judgment". Our English word "once" here is from the Greek adverb, ἅπαξ, which means, "once only, once for all". Death comes to all humans once and for all time, and thereafter, "judgement", no "second chance", or "reincarnation", or anything else. This verse is quite final.
Secondly, in 2 Corinthians 6:2, the Apostle Paul says, "For he says, I have heard you in a time accepted, and in the day of salvation have I helped you: behold, now is the accepted time; behold, now is the day of salvation". Note the use of the Greek adverb, "νῦν" twice here, "at the present time, NOW". Not later, as the emphasis in on the PRESENT time for one's salvation, nothing of any after death hope.
Thirdly, Jesus give an account in Luke 16, verses 19-31, about The Rich Man and Lazarus. It is very clear from this, that even after death, though the rich man could see Lazarus as blessed, and himself as being tormented, there is nothing said about any after death "offer" for him to be saved. In fact, he pleads that someone be sent to his house, to warn his family about the terrors of hell, that they do not end up there. If there were any hope of a "second chance", then surely Jesus would have told us this in this account, that deals with the after death experiences of the saved and unsaved. There is a "gulf fixed", and no one can change their place after death, is what Jesus here means. There is no "crossing over" from Hades, after another "chance" has been offered, and the sinner accepts and then go to heaven. This is no more than wishful thinking.
Fourthly, in 1 Corinthians 15:29, the Apostle Paul says, "Else what shall they do who are baptized for the dead, if the dead rise not at all? why are they then baptized for the dead?". This "baptism for (ὑπέρ, instead of) the dead", is thought to be a practice where those who died uncertain of their final destiny, are "baptized" in a living relative on their behalf, in the hope that they could be saved after death. Something quite foreign to the teaching of the Holy Bible, and similar to what some are saying about a "second chance" for the lost after death.