[sokoloff]

Wouldn’t the actual presence of a dog be better evidence of a dog walk than a paper saying you’re walking a dog?

This sounds like a rejected Monty Python sketch. “Pardon, monsieur; why are you out after curfew?” “I’m walking my dog!” “What dog?” “I have the paperwork right here.” “Very well; bonne nuit!”

[brmgb]

It is to have people have the time they went out and the place they are staying at written (or on an app actually) so it can be checked during controls.

If it wasn't mandatory, people could stay out all night and go wherever they wanted provided they were bringing a dog with them.