Jake Forster-Caskey has joined League Two side Stevenage on a permanent deal.
The 28-year-old midfielder signed for Charlton in January 2017 and played 128 games for the Addicks, scoring 13 goals.
Charlton Manager Dean Holden said: “Jake has been here for six years now and has been a valuable player on and off the pitch for the club. I've had some good, honest conversations with him since I've come in to the club - his professionalism has been exemplary in that period.
"He wants to go and play games. He's missed time through serious injuries and he's at a period in his career where he needs to be playing regularly. Me and him had a good conversation and found a solution which suits Jake and suits the club as well. We wish him well."
Forster-Caskey was part of Charlton’s promotion squad in 2018/19 and picked up the Fans’ Player of the Year award for the 2020/21 season. Speaking following the move he said: “I just want to say a massive thank you to every Charlton fan. You made Charlton my home from the day I came to the club and you supported me through a couple of tough injuries and I will forever remember that.
"You, the supporters, are the ones who make Charlton such a special club and I loved every minute of playing in front of you guys in red and white. Good luck, JFC."
The club would like to thank Jake for his efforts over the past six years and wish him all the very best in his future career.