There are various cases where a domain name may not be transferable to another Registrar. This could happen in the following circumstances:
1. Domain name is less than 60 days old: If the domain name you are trying to Transfer was registered less than 60 days ago, the request will get rejected by the Registry itself. Domain names less than 60 days old are not allowed to be transferred to any other Registrar as per ICANN Guidelines.
2. Domain name has been transferred less than 60 days ago: A domain name cannot be transferred to another Registrar within 60 days of a previous Transfer. For example, a domain name cannot be transferred from Registrar B to Registrar C, if it has been transferred to Registrar B from Registrar A within the last 60 days. An exception to this rule is the Transfer back to the previous Registrar in cases where both Registrars so agree and/or where a decision in the dispute resolution process so directs.
3. You have locked your domain name: If you have locked your domain name from the Control Panel provided by the Current Registrar, then a Transfer for that domain name will not be allowed. You will first have to unlock the domain name from the Control Panel and then proceed with a Transfer.
4. Your Registrar has applied a Lock or Hold on your domain name: If the Current Registrar has applied a Lock or Hold on the domain name due to some pending issue, you would be advised to get in touch with their (current Registrar's) Support Team to resolve this issue, before applying for a Transfer.
5. The domain name is in the Redemption Grace Period or in the Pending Delete status: If the domain name is in either of these statuses, it cannot be transferred.