|John Francis Venture-Lieutenant, California—Silicon Valley aka JohnF|
If you were there for 5 minutes and had to leave simply say 'I would prefer not to get the Chronicle sheet for this and I cant stay for the rest of the game'
The player is stil supposed to get a chronicle sheet for this - they aren't allowed to decline a chronicle, nor is the GM supposed to not supply them with a chronicle (and is supposed to report the game, showing that player/character has played it).
Your local VC can make exceptions to this rule in the case of real-world issues (family emergencies, unexpected events, etc.). But other than that, once you've filled out the sign-in sheet you are supposed to get a chronicle (and you're supposed to fulfill your obligations to the other players at the table, and actually play the whole game you signed up for; if you can't commit to being there for the whole four-hour slot, you shouldn't have signed up in the first place).