All registrars are able to provide you with invoices instead of credit cards. If you do not wish to pay through a credit card, simply request your registrar to send you an invoice. Should a registrar refuse your request, please contact us at:
At the present time, the .aero registry does not offer IDNs.
According to Domain Management Policy, Domain ownership transfers are allowed. In this case the registrant of the domain name simply requests this transfer from their registrar.
Who belongs to this group?
National and regional civil aviation authorities, governmental departments regulating civil aviation, accident investigation bodies.
If your fall into one of the above categories then you are eligible to register your .aero domain name.
What are the credentials for this group?