50 Cent loves to flaunt his money on Instagram. However, it looks like Fif might have just been caught using someone else's photo to flex his cash.

The IG photo in question -- of cash in pink trash bags -- was cross referenced on Google by folks on the popular rap forum KTT and they found it dates back to a 2010 traffic stop in Maine that 50 had nothing to do with.

50 Cent is currently engulfed in a back and forth Instagram war with Meek Mill. This type of news is the last thing he needs, because if Meek Mill sees it, there's more ammo for him.