With todays technology it is completely impossible. People are going about trying to have something that will instantly destroy something at one point and recreate it perfectly at another point without any damage to the being, and have all of the moving parts moving exactly as they were before being sent. Lets list the reasons why that cannot happen
Firstly it would not be possible to perfectly map and destroy something to be recreated exactly the same because the time it takes to map something so complex as the inner workings of a body cells and micro organisms would have moved thus making it impossible to have mapped. The only way around this would be to speed up the being to the point where all the molecules are transformed into light, and have this light sent to the destination and slowed down again. Of course that would not work for the other reasons teleportation would not be possible.
Think of how your computer picks up a wireless signal, if there is another signal transmitted at the same time it would interrupt the signal and corrupt the teleportation so the reciever would stand a good chance of losing the person before they arrived. Light and electronic waves are easily distorted by objects in the way, shifts in the atmosphere etc could easily corrupt a signal too leading to someones insides being in the wrong place and even outside. Also sometimes even conditions can be perfect like your computer gets but only half of the web page you are trying to get loads up for no reason only reloading it would fix the problem but with someone being sent as a beam of light there is no reload button, its you get them or they die.
A way around those problems would be to speed them into light place them in a capsule fire that at the destination have them remove the capsule and slow down the being but I still think things could easily go wrong there especially as the being would be stationary light in the capsule and possible change or start to reintergrate as there is no motion propelling them forward enough to remain as light molecules.
Also in this day and age we lack anything powerful enough to speed up a living creature to the point where thier molecules would become light thus ruling out the possibility the energy required and the space requirements of such a device would be enormous unless some sort of gravity well manipulation where involved spinning the space around the being to such a speed that they would be in a contained cyclonic event speeding up their molecules to the speed of light.
Reality is we should find another fast way of moving around our planet such as faster personal transportation vehicles which can fly, underground high speed magnetized trains between all continents, or some new feasible transportation method.