PC Palmer had been a Charlton supporter and season ticket holder. His regular seat at the Valley was replaced with a white chair bearing his warrant number ‘P204752’.
A minute’s silence was held before kick-off at 7:45pm, with representatives from Charlton, MK Dons and the police laying wreaths in memory of PC Palmer.
His colleagues from the Territorial Support Group and Parliamentary Protection Units stood alongside the Charlton and MK Dons players during the period of silence, with the teams having been led out by PC Palmer’s brother.
The Addicks squad, who will donate their match fees to PC Palmer’s family, wore specially designed versions of their home kit bearing the warrant number and the message “#WeStandTogether”.
Many supporters laid floral tributes outside the Valley before kick-off, with messages from Chelsea supporters spotted among those from the Addicks faithful.
Charlton will donate 50 per cent of all ticket sales to PC Palmer’s family and after the match will begin work on a permanent memorial stone for the officer, who was one of four people to lose their lives in the attack by Khalid Masood on Wednesday March 22.
On the field Charlton suffered their third straight defeat, Stuart O'Keefe and Harvey Barnes scoring in a 2-0 win for MK, but tributes continued during the match with fans chanting "Stand up for Keith Palmer".
The defeat however leaves Charlton only four points clear of the League One relegation zone with five games remaining.