The french authorities announced new demands to follow Macron law
Up from 01.04.2017 the posted drivers in France must have with them in the truck one new document called "A1" or otherwise
a document to prove that this "A1" document was requested and, within 2 months after the control, be able to provide the "A1" document to the relevant authorities
This new document demanded to follow Macron law or Loi Macron called "A1" is a statement of applicable legislation
and it is issued by the social security institution you are registered in your origin country.
If you need further information you can click here: http://europa.eu/youreurope/citizens/work/social-security-forms/index_en.htm
You can also contact us if you need to receive some support, as usual.