Dear Mr. Wagnerowski,
Thank you for your e-mail.
We send the invoice for the domain martin-meisterbetriebat.at to your ISP, because know it is already registered. But you could inform your Provider about the wrong registration and he could change the domainname between the first 28 days after registration. But i don`t know if they send you an invoice for that.
If you have further questions, don´t hesitate to contact us.
best regards
Andrea Gruber
nic.at Service - Team