According to this book, approaches vary most by the general goals of the polity implementing them, but also by the specific histories of the refugees. In New Jerusalem, many of those rescued from hells are processed the same way as other new arrivals: offered food, shelter, translation, and maps, and left to figure out for themselves what to do next. If they or their families ask for it, they can get free spiritual counseling or classes on certain basic skills or a handful of other things. But sometimes this is not an adequate solution.
For instance, sometimes they didn't have much of an education before death, because they died young or had neurological problems or were raised by animals or any number of things, and then spent their entire afterlife getting not-very-educationally tortured, and then they come to New Jerusalem or another not-very-bad polity as adults who lack even the skills necessary to independently figure out how to get oriented or what they need to know. Translation magic can only do so much for people who don't have a first language; maps aren't much use without the concept of representational art; common sense founded in experience isn't much use in sufficiently unfamiliar situations. Some polities that accept some refugees still sometimes won't accept people who don't have at least one language, or can't count, or don't know what a society is or what a law is. Some will accept them and dump them out in the wilderness somewhere they won't get in the way. New Jerusalem sometimes places them with people or families who think they can help and seem competent, and sometimes keeps them in institutions where they can be kept out of other people's way and taught what they need to know. There's substantial debate within New Jerusalem about how strongly to incentivize them to learn quickly. On the one hand, it's not like they'll die if left alone in a big walled garden for a while if they're too suspicious or tired or overstimulated to want to engage with a class; on the other hand, the longer they stay, the longer it takes any given facility to be ready to handle more, and they also can't make their own informed choices about how fast to learn because they can't know what they're missing because not knowing that is their entire problem. The good news is, at least, that dead people are very hard to permanently damage, and don't have much trouble picking up a first language at age five hundred.
A thornier problem is the places that try very hard to convince people to do things that are popularly glossed as "evil" - torturing people, going to Earth to talk living people into hurting others, or possibly coming to New Jerusalem to cause problems. They sometimes end up detained, as well, but that's less common. It's less clear that this benefits them and it's not that easy to do unfixable harm in the time it usually takes New Jerusalem's law enforcement to respond to a problem. The current policy is that if they're not trying to break the law and they want to be left alone they should be left alone. But not all of them want that; some of them are badly out of practice making choices, and some have lost confidence in their own judgment, and some don't want to take the risk that they'd be alone if their former overlords sent anyone after them. At any rate when they pass through official channels directly from their hell of origin - as opposed to sneaking in, or immigrating after living peacefully in an allied polity - the available services are opt-out, not opt-in. It's different in other polities, of course; some won't take them and some don't let them go free without passing some sort of evaluation, and on the other end of the spectrum, the Dead Republic's official position is that immigrants from all cultures are equally welcome and no one should be singled out because of their background. Most polities' policies are controversial - people criticize New Jerusalem in particular for not trying harder to make help available, and for making it too hard to avoid, and for aiming to make people more convenient for their neighbors in ways that aren't in their best interest, and for not trying harder to teach these people right from wrong, and for letting them immigrate at all, and for treating innocent victims with such unreasonable suspicion...