Step 2: Submit Your Duplicate
Once you find an SBC you like, then it's time to fill out the requirements along with your duplicate.

If you want to infinitely recycle an 84+ or 85+ ten-player pack FIFA 23 coins, you should use three high-rated (90+) Team of The Season Cards, one or two 84-85-rated cards, and fill out the rest with 78-83 overall players.

If you go over the requirements, start to replace high-rated cards with lower-rated ones until your next downgrade will miss the requirement.

Doing this will allow you to ensure you're not overpaying for an SBC and are making the best use of every overall rating point.

Make sure you don't accidentally remove your duplicate from the SBC while you are making adjustments for rating.

Step 3: Claim Your Reward And Duplicate Card
Now that the duplicate has been used, you can return to your packs and click one to bring up the Claim Items screen.

Your duplicate will now be gone from your club, and you can claim the new card here.

Once your card is claimed you can return to opening packs at your leisure, now with more chances to get a surprisingly high-rated player given your shrewd use of redundant cards.

Experimenting with duplicates and SBCs will allow you to maximize the rewards you're getting and put you on the path to Ultimate Team glory buy FUT 23 coins.