It is a cheery message on ORANGE!
and the other side of this recycled cardboard is also nice, in PINK, for a "nice hair day".
I had trouble trying to read the address,
but with a bit of help from Google, I understood that
it came from a very nice book and paper store in Dreux, France:
Libraire Papeterie La Rose De Vents
See the uplifting space:
MERCI! Thank you for sending the HELLO!!