ACSI mistake

I'm posting this in the hope that it will prevent others from doing the same thing.

I bought the ACSI card and camping carnet this year as I understand that it represents very good value for money.

When we came to pack ready for our trip I only took the book for France as that was the only country we would be visiting. The ACSI dicount card is in the other book. ******

Fortunately I knew exactly where I had left it and was able to get a pal to post it out to me. (It arrived in 3 days)

 Apparently this is not an uncommon mistake. The ACSI camping carnet is not accepted as the discount card and this is actually stated on it.