How will Jesus be recognized at the time of "Second Coming"? All major Christian denominations await the "Second Coming" or the "Return" of Jesus the Christ. How will he be recognized by Christians at that time? What are the criteria to be fulfilled? Surely, not just any claimant can be believed to be Jesus.
Scripturally speaking, Jesus isn't going to return quietly.  Several passages refer to what is going to happen when he returns. 

1 Thessalonians 4:15-17:


  For this we declare to you by a word from the Lord, that we who are
  alive, who are left until the coming of the Lord, will not precede
  those who have fallen asleep. For the Lord himself will descend from
  heaven with a cry of command, with the voice of an archangel, and with
  the sound of the trumpet of God. And the dead in Christ will rise
  first. Then we who are alive, who are left, will be caught up together
  with them in the clouds to meet the Lord in the air, and so we will
  always be with the Lord.


Matthew 16:17 echoes this (emphasis mine):


  For the Son of Man is going to come with his angels in the glory of
  his Father, and then he will repay each person according to what he
  has done.


1 Thessalonians 1:7-8 also speaks of what will happen when Christ returns:


  ...when the Lord Jesus is revealed from heaven with his mighty angels in
  flaming fire, inflicting vengeance on those who do not know God and on
  those who do not obey the gospel of our Lord Jesus.


Also, Matthew 24:31:


  And he will send out his angels with a loud trumpet call, and they
  will gather his elect from the four winds, from one end of heaven to
  the other.


In 1 Corinthians 15:52, when Christ returns, the dead will be raised:


  in a moment, in the twinkling of an eye, at the last trumpet. For the
  trumpet will sound, and the dead will be raised imperishable, and we
  shall be changed.


I don't believe it'll be a matter of us believing it's him or not.  In other words, when Christ returns, I think it'll be one of those things where, for the lack of a better phrase, "you'll just know."  His return will be accompanied by angels, dead people coming to life, the sound of a loud trumpet, and he will be coming in on the clouds in glorified form. 

In other words, Christ's return will be a big deal.  You won't have to wonder. 

Addendum

I had a couple of questions in the comments.  The first one was concerning whether Christ's second return was going to be a secret event as it is portrayed in the movies.  I'm assuming this is referring to, mainly, the popular Left Behind series.  The Left Behind series portrays the end times from a dispensationalist, pre-trib rapture, millennial perspective.  My understanding of the end times is amillennial.  Therefore, I do not believe in a "rapture" that will take the Christians off of the earth, leaving the non-Christians on the earth for seven years to sort it all out.  Though I was raised in that tradition, I found it to be overly complicated, and too recent of a development (John Darby, 1800s) for comfort.  

The amillennialist viewpoint would make for a terrible movie.  In a nutshell, it can be summed up by the following: One day, Jesus is going to come back, punish those who rejected him, reward those who are his, and establish his kingdom.  The viewpoint also approaches revelation from a completely different perspective, which, unfortunately, typically requires a significant amount of deprogramming from the dispensational millennial viewpoint, if the student is coming from that perspective, and that level of detail would be outside the scope of this answer.  I'd recommend More Than Conquerors by William Hendrickson.  For an excellent audio resource, I'd recommend Randy Pope's "The Rest of the Story" series, available on podcast. 

As for why we should look for the man with the sword, Revelation 19:11-16 details a glorified view of Jesus with a sword coming out of his mouth.  Whether that is literal or not, we can't be sure, but what we can be sure of, is that when Christ comes, he will look like no man we've ever seen, and it will drive everyone to their knees, some in terror because they've rejected Christ, and some in joy because they know they are his. 


  Then I saw heaven opened, and behold, a white horse! The one sitting
  on it is called Faithful and True, and in righteousness he judges and
  makes war. His eyes are like a flame of fire, and on his head are many
  diadems, and he has a name written that no one knows but himself. He
  is clothed in a robe dipped in blood, and the name by which he is
  called is The Word of God. And the armies of heaven, arrayed in fine
  linen, white and pure, were following him on white horses. From his
  mouth comes a sharp sword with which to strike down the nations, and
  he will rule them with a rod of iron. He will tread the winepress of
  the fury of the wrath of God the Almighty. On his robe and on his
  thigh he has a name written, King of kings and Lord of lords.