What products have you already tried? Or have you? And do you have mild scarring or severe?
I will tell you what worked for me. I did chemical peels and microdermabrations along with the use of retinols. I also use kojic acid at night, and I exfoliate every other night. Right now I am getting some nice sloughing of the skin from using Vit C serum along with my retinol. I wouldn't try this if you have sensitive skin.
Very mild scarring you can use at home procedures. For more severe scarring, it might take a trip or two to a spa for a couple peels and or microderms. Just be patient with the fading of acne scars, as it does take some time. And be sure to always wear sunscreen, to avoid your scars from getting darker being exposed to sunlight.