Upvote:3
I have issued the same declaration multiple times before, and I was never required to be at the airport or anything like that. There's no official requirement for that.
Just in case, even though it's completely not necessary, you may want to be available by phone. However usually border controls aren't strict at that point, the only thing they usually ask is health insurance. I don't know anyone who ever had troubles with that.
Bon Voyage!