If you rent a rental car with Ownerscars we recommend you always drive with your shirt on. Maybe you’re more comfortable, but can distract other drivers.
And, driving without a shirt violate the provision of Article 18 of the General Traffic Regulations, which entail a fine of 80 euros to 200 euros.
According to 18.1 «The driver of a vehicle must maintain their own freedom of movement, the required field of vision and permanent attention to driving, to ensure their own safety, the rest of the vehicle occupants and the other road users. »
If the agent believes that going shirtless is a distraction for other road users, has put the legal basis for the complaint. The agent that sanctions always have to determine and expose the facts underlying the complaint.