A hearing held by David Boon, of the Emirates Elite Panel of ICC Match Referees, in Southampton on Thursday found Jadeja not guilty of a level two offence with which he was originally charged, although the 25-year-old was instead found guilty of a level one offence and was hit with the maximum punishment available under that sanction.
The news is the latest twist in the much-publicised fallout between Anderson and Jadeja, following an altercation that occurred between the two at lunch on the second day of the opening Test at Trent Bridge earlier this month.
Seamer Anderson was hit with a level three charge by the ICC and faces a disciplinary hearing next Friday after being accused of "abusing and pushing" the Indian.
England team manager Phil Neal responded to that charge, which came following a complaint from India team manager Sunil Dev, by reporting Jadeja under a level two of the ICC code of conduct.
Assessing Jadeja's role in the fracas, Boon said: "Under Article 6.1 of the Code, I had to be comfortably satisfied that the offence had occurred in order to find Mr Jadeja guilty of an offence under Article 2.2.11.
"While I was in no doubt that confrontation did occur, and that such conduct was not in the spirit of the game and should not have taken place, I was not comfortably satisfied that this was a level 2 offence.
"Therefore, in exercising my discretion under Article 7.6.5 of the Code and having heard all the evidence, I was comfortably satisfied that Mr Jadeja had committed a level 1 offence under Article 2.1.8 of the Code."
Jadeja, who played a key role in the tourists' 95-run victory at Lord's in the second Test that saw them take a 1-0 lead in the five-match series, has no right to appeal against the charge.
Anderson attended Jadeja's hearing and will lean his fate next Friday, having been cleared to play in the third Test at the in Southampton - which starts on Sunday.
England's front-line seamer could be banned for up to four Tests at a hearing to be conducted by judicial commissioner Gordon Lewis.