However, two Alvaro Morata goals would secure the win for the Blues, who never really faced much of a threat from Forest.
However, his final bow in west London didn't exactly go to plan, with Fabregas actually missing a penalty in the first-half.
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Morata finally had the ball in the net after half time, slamming from close range after fine work on the right from Hudson-Odoi.
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In a tweet, he said he was taking "action against one of America's largest corporations for what we allege is egregious behavior". The Weather Channel app is the top app in the App Store's weather category and counts more than 100 million user downloads.
Alvaro Morata scored the two goals but it was not quite the flawless send off for Fabregas, who missed from the penalty spot.
It looked like Fabregas would crown his final game with a goal wehn Ruben Loftus Cheek was brought down in the box in the 30th minute. But he was unstoppable on the wing just before the hour when he sent a cross sailing to the far post where Morata looped a header beyond Steele to double Chelsea's lead and put the game beyond Forest, who were toothless in attack and showed no sign of mounting a comeback.
Fabregas returned to the pitch after the full-time whistle and was visibly emotional as he paid tribute to the Chelsea fans.
Fabregas joined Chelsea from Barcelona in 2014 and became an instant hit at the club.
"I can say that I was lucky to play with him".