In some countries it’s the law to carry your passport at all times. Or at least ID.Calm down Mildred.
I am merely referencing club advice to a) take precautions due to prevalence of street crime and pickpocketing in Marseille and b) carry your passport at all times.
My precaution for a) will be not to carry my passport at all times, a standard practice whenever I am abroad I would add.
My advice would be to take a photo of your passport and any other ID on your phone and leave your passport in the hotel safe (or other safe place). The club have accepted phone images (which will be connected to your season ticket in your phone wallet) to collect away tickets in the past, I’m sure they will accept them in France.
There, not difficult is it………………..