(adsbygoogle = window.adsbygoogle || []).push({}); 1. Sign into the ps4 with the higher level account you want to dupe.
2. Go to multiplayer then click public match.
3. Now I sit there for about 30 seconds.
4. Press Circle to get back to where the guy with the two guns is at (Main Menu)
5. Hold down the ps button then go down to switch users, Switch to the low level account or the one you want to dupe over.
6. As soon as you're logged into the lower level account tap (X) once then wait a second then tap (X) again.
7. From here you should be on local, head to play online.
8. Find game and join. Get a kill or death then leave.

The glitch should now have worked and you duped an account with one controller.
*These are the steps I have been using, occasionally my black ops 3 will force close then you will have to retry it. I found this completely by accident. I just decided to post it today because everyone else is. I was going to initially release it when the 2 controller method got patched. Thanks guys have a great day / night. Im willing to help anyone out that needs help with this.

Credits: Chuck54321
RageKing

when i log into 2nd acc and press X i get a black screen and a error msg

Thanks!

Same happened to me when I tried

You do this and then the old prestige glitch i got it first try.

I get what you did bro I did same thing but re word your steps ...

what u mean then old prestige glitch after i do this am i suppose to add 2nd controller or something?

No you start with both controllers but before you do the old prestige glitch you go on the high level account for 30 seconds

No second controller needed. I can post a video tomorrow so it will help out better.

No problem glad it worked for you!