I just checked my notes (series 2) and they are still funded.
But the only public address i have is the QR code on the note.
In my Bitcoin Suisse account i see no info regarding the notes.
Edit : I believe this applies only to their second release. You had to create an account, are given your address to fund ahead of shipping. Note has different address than the one given at account setup.
If i remember correct i needed to send a security code (that i had received in a letter with my notes) by mail to fund my notes.