Terry left Wembley at the end of the first day of the hearing at 14:50 BST having been represented by George Carter-Stephenson QC, who defended him in court two months ago.
At July's trial, Westminster Magistrates' Court heard accusations that Terry had insulted Ferdinand, describing him as "black" and using extreme sexual swear words.
In reaching a not guilty verdict, chief magistrate Howard Riddle stated it was "possible that what was said was not intended as an insult but rather as a challenge to what he believed had been said to him".
The prosecution had to prove beyond reasonable doubt that Terry had used the words in an insulting manner, which it could not.
But the FA only has to prove its case "on the balance of probabilities" and the use of racist language is a breach of the rules.
On Sunday, Terry, who won 78 caps for England, said the FA's decision to pursue charges against him after being cleared in court meant his position with England had
a claim disputed by FA general secretary Alex Horne.
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