Bootleg Warning : Nendoroid L (Good Smile Company)
Below is one example of a bootleg figure, please note that is is only one possibility. You should always be on the look out for anything suspicious.
Also note that there can be bootlegs of various figures, not just the examples shown on this website.

The orange used on the bootleg version is a much darker shade of orange. You can also hardly see the pattern in the background.

The bootleg version features very thick borders around all parts of the eye. The edges of the eyes also have very blotted looking paintwork.
The skin on the bootleg version is also much more glossy than the official version.

The official version features an extra part separated from the legs of the chair, while the bootleg version simply creates a single piece.
The official version also uses ABS for the chair legs, allowing for a sturdy leg that will not bend.
The bootleg version uses a softer plastic that bends if you apply pressure.

The official version fringe attachment parts are a skin color, while the bootleg version makes use of an off-brown color.