Clicking this button flags the corosponding player as being on time for the raid.

If your guild gives a DKP bonus for being on time this box determines if a player will recieve that bonus.

If your guild gives a start to finish bonus, this box being checked is a requirement for recieving that bonus

Your DKP Scribe will auto detect whether or not a player is on time at the time he is invited to raid.

as of version 3.0, checking this box will automatically adjust the corosponding players DKP total by the amount of the "on time bonus" specified in the settings window