ICANN has recently allowed for the release of 2 character and ccTLD labels. These names are subject to the 90-day claims provision, even though their TLDs are well past the initial mandatory 90 day period. The Donuts SRS is able to service claims on a sub-set of the labels in the TMCH, with a specific timeframe just for those names. If a domain is on the sub-list and a registrar sends a check command, Donuts will return a claims lookup key.
The registrar must send the matching TCNID along with the create command. If a domain is not on the sub-list and a registrar sends a check command, we will not return a key, and the registration can proceed without the TCNID.
Example: The .camera TLD had its mandatory claims period from February -April 2014. Only now is Donuts allowed to sell 2 character labels in [.camera]. [ap.camera] is on the sub-list because it is a 2 character, recently released, that has not yet been subject to claims. If a registrar sends an avail check and then requests a lookup key, Donuts will respond with a lookup key, and require the TCNID to proceed with the registration. Although it is on the TMCH DNL list, [microsoft.camera] is not on the claims sublist, because it has already been through claims during the original 90 day period. If a registrar sends an avail check for [microsoft.camera], and then a request for a lookup key, Donuts will not respond with a lookup key.
No TCNID is required to proceed with the registration. In other words, Registrars may “turn on claims” for the entire TLD but only labels on the sub-list will be subject to claims.