Please enter the domain name without the TLD (ex. .com, or .net, etc.) and without the “http://www.”. For example, only put the domain (ex. gandi) in the text area, and check the box of the TLD that you want to add to it.
It is possible to reserve the same domain in more than one TLD.
For .com and .net, you may register an IDN (domain with accented letters)