This has been a bug in Star Wars: The Old Republic for almost a year and it seems Bioware has still not fixed it, so I figured I’d bring some attention to it.
The trick works in both PvE and PvP and basically makes you invisible minus the light-sabers. The only requirements are that you are at least level 30 so you have the Force Camouflage skill opened. Below are the steps you need to take to make this work.
1) Target an enemy
2) Either hit ‘Force Camouflage’ .1 seconds before ‘Force Charge’ OR try to get ‘Force Camouflage’ off while in a charge. This takes a little practice, but once you get it down it’s easy to do.
3) Once the normal effect of ‘Force Camouflage’ fades, you’ll go invisible
If you activate Camouflage again you will come out of stealth.
Below you can watch a video of someone using this SWTOR invisibility exploit.