Nominet, .UK Registry has a seperate method for domain transfers
http://www.nic.uk/howto/change-isp.html

For each instance where a Registered Name holder wants to change its Registrar for an existing domain name (i.e., a domain name that appears in a particular top-level domain zone file), xReg requires:

1. Express authorisation to initiate the transfer process from an individual who has the apparent authority to legally bind the Registered Name holder (as reflected in the database of losing Registrar).



2. In instances when the Registrar of record is being changed simultaneously with a transfer of a domain name from one party to another, eNom also requires submission of appropriate authorization for the transfer. Such authorization shall include, but not be limited to, one of the following:
   
   1. A bilateral agreement between the parties.
   2. The final determination of a binding dispute resolution body.
   3. A court order.
      
3. Instances when the requested change of sponsoring Registrar may be denied include, but are not limited to:
   
   1. Situations described in the Domain Name Dispute Resolution Policy.
   2. A pending bankruptcy of the Registered Name holder.
   3. Any dispute over the identity of the domain name holder.
   4. Dispute over the identity of the Registered Name holder.
   5. The original registration took place less than sixty (60) days prior to the transfer request.
   6. The current Registrar rejected the transfer.
   7. The domain name has been placed in a locked status by either the Registry or by the losing registrar.
   8. The domain name has expired.
   9. Transfer orders over 30 days old.

YOU AGREE THAT XREG WILL NOT BE LIABLE FOR:

1. ANY SUSPENSION OR LOSS OF THE DOMAIN NAME REGISTRATION IN YOUR NAME
2. USE OF YOUR DOMAIN NAME REGISTRATION BY YOU OR OTHERS, WHETHER OR NOT AUTHORIZED BY YOU TO HAVE SUCH USE
3. INTERRUPTION OF BUSINESS
4. ACCESS DELAYS OR ACCESS INTERRUPTIONS TO THIS SITE OR THE WEB SITE(S) YOU ACCESS BY THE DOMAIN NAME REGISTERED IN YOUR NAME
5. DATA NON-DELIVER, MIS-DELIVERY, CORRUPTION, DESTRUCTION OR OTHER MODIFICATION
6. EVENTS BEYOND GO DADDY SOFTWARE’S REASONABLE CONTROL
7. THE PROCESSING OF THIS APPLICATION
8. APPLICATION OF THE DISPUTE POLICY
   

XREG WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY KIND (INCLUDING LOST PROFITS) REGARDLESS OF THE FORM OF ACTION WHETHER IN CONTRACT, TORT (INCLUDING NEGLIGENCE), BREACH OF WARRANTIES, EITHER EXPRESS OR IMPLIED, OR OTHERWISE, EVEN IF GO DADDY SOFTWARE ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES MAY NOT ALLOW SUCH A BROAD EXCLUSION OR LIMITATION OF LIABILITY FOR DAMAGES, AS CONTAINED HEREIN; IN SUCH STATES, OUR LIABILITY IS LIMITED TO THE FULL EXTENT PERMITTED BY LAW. IN NO EVENT SHALL GO DADDY SOFTWARE MAXIMUM AGGREGATE LIABILITY EXCEED THE TOTAL AMOUNT PAID BY YOU FOR REGISTRATION OF A DOMAIN NAME.