We can classify false prophets for the sake of discussion.For example, anyone other than Christ claiming to be Christ is a false prophet... and we have lots of warnings in scripture, as gumby pointing out. However, this is not the only sort of false prophet. Prophesying is not strictly "foretelling". Biblically it carries the connotations of preaching, teaching, warning, and the sharing of any knowledge gained supernaturally, which could be foretelling. Put another way, prophesy can take the form of forthtelling (consoling, teaching, warning, etc), foretelling (telling the future), or both. Forthtelling is arguably the most common form in our times, and likely so in most times. So I don’t confuse anybody, let me assure you I believe scripture is complete, but God can continue to reveal things.Prophesying is for the building up of the Church, and must be orderly. Also, a prophet is subject to the discerning and prophesying of others. (See 1 Corinthians 14:29-30). Prophesying (unlike the prophesying for the scriptures, see 2 Peter 1:20) doesn’t mean God is ‘forcing’ you to exactly say certain things. Paul wouldn’t write to have one prophet stop speaking when another starts if God was going to take care of that for us.Thus, even a "true prophet" can smudge a few details, which is why others will evaluate, and why one prophet should yield to another. Prophesy in scripture is of course flawless and was 100% breathed by God. (See again 2 Peter 1:19-21), so don't get me wrong. It is like we are cell phones receiving calls. We don't always receive the signal well (the issue is on our end); we may misunderstand or "mishear" a few words. That doesn't make us false prophets, but it does give cause to have others evaluate what was said. This is the same for any teaching or preaching. The teacher and preacher are trying to communicate God's truth. They have a legitimate connection with God, but they can make errors.Crudely put, a "true prophet" is receiving signals from the Spirit. A false prophet is receiving signals from Satan indirectly by "making crap up", or directly receiving signals from Satan, ie speaking from Satan.I think most false prophets in our culture are of the "indirect" Satanic form. Paul warned a lot about teachers, preachers, and prophets who would "preach" to get money, status, respect, fame etc.. They are telling lies, half-truths, twisted truths, and maybe a few truths. They are not like the "true prophet" because they are only pretending to have God on the line.We can discern these by testing them against the standards of Scripture. You want to keep "indirect" prophets out of your household like you would the flu, rabid rats, or the common cold. Their teachings can cause various levels of problems, and should not be welcome in any degree.Of the directly Satanic type, you want to keep it out of your household like you would the Ebola virus. It is the most destructive kind of false prophecy, arguably, but isn't all over the place like the indirect type. Scripture gives us a way to test spirits. 1 John 4:1-6. I don't recommend testing the "indirect" false prophets by asking them about Jesus like 1 John 4:2-3 has us test the spirits. False prophets can say all the lies they want to, including that they believe that Christ came in the flesh to pay for our sins bla bla bla [send me money], but they do not know God. Test them against the scriptures.Under the covering of a Bible believing Church and the Spirit, "direct" false prophets aren't persistently a threat. You don't have to be constantly looking over your shoulder. However, false doctrines are all over the place. We should not be complacent.To answer the question, I have met false teachers who pretend belief to get money. I haven’t met any people claiming to be Christ, or that I could say were unambiguously speaking directly from Satan.-Redeemed22