From HEXONET Wiki
If the registrant address is outside of the UK an address for service is required. This can be provided by creating a service contact handle with the desired service address using a standard <contact:create> command and assigning this contact handle as administrative contact of the domain using a standard <domain:create> or <domain:update> command. Any previously created contact handle with an address in the UK can be used as a service contact handle.
EPP example of the creation of a service contact handle:
COMMAND
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<epp xmlns="urn:ietf:params:xml:ns:epp-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:ietf:params:xml:ns:epp-1.0 epp-1.0.xsd">
<command>
<create>
<contact:create xmlns:contact="urn:ietf:params:xml:ns:contact-1.0" xsi:schemaLocation="urn:ietf:params:xml:ns:contact-1.0 contact-1.0.xsd">
<contact:id>SERVICE-C1</contact:id>
<contact:postalInfo type="int">
<contact:name>John Doe</contact:name>
<contact:org>Example Inc.</contact:org>
<contact:addr>
<contact:street>123 Example Dr.</contact:street>
<contact:street>Suite 100</contact:street>
<contact:city>Oxford</contact:city>
<contact:sp>Oxfordshire</contact:sp>
<contact:pc>OX4 4DQ</contact:pc>
<contact:cc>GB</contact:cc>
</contact:addr>
</contact:postalInfo>
<contact:voice>+44.1234556789</contact:voice>
<contact:fax>+44.1234556789</contact:fax>
<contact:email>[email protected]</contact:email>
<contact:authInfo>
<contact:pw>2fooBAR</contact:pw>
</contact:authInfo>
</contact:create>
</create>
<clTRID>HEXONET-EPP-EXAMPLE</clTRID>
</command>
</epp>
RESPONSE
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<epp xmlns="urn:ietf:params:xml:ns:epp-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:ietf:params:xml:ns:epp-1.0 epp-1.0.xsd">
<response>
<result code="1000">
<msg>Command completed successfully</msg>
</result>
<resData>
<contact:creData xmlns:contact="urn:ietf:params:xml:ns:contact-1.0" xsi:schemaLocation="urn:ietf:params:xml:ns:contact-1.0 contact-1.0.xsd">
<contact:id>SERVICE-C1</contact:id>
<contact:crDate>2014-05-01T08:25:12.0Z</contact:crDate>
</contact:creData>
</resData>
<trID>
<clTRID>HEXONET-EPP-EXAMPLE</clTRID>
<svTRID>RW-4228-1398932712362119</svTRID>
</trID>
</response>
</epp>
EPP example of a .UK registration with a registrant address outside of the UK and use of a service contact:
COMMAND
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<epp xmlns="urn:ietf:params:xml:ns:epp-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:ietf:params:xml:ns:epp-1.0 epp-1.0.xsd">
<command>
<create>
<domain:create xmlns:domain="urn:ietf:params:xml:ns:domain-1.0" xsi:schemaLocation="urn:ietf:params:xml:ns:domain-1.0 domain-1.0.xsd">
<domain:name>hexonet-epp-example-domain-with-service-contact.uk</domain:name>
<domain:period unit="y">2</domain:period>
<domain:ns>
<domain:hostObj>ns1.hexonet.net</domain:hostObj>
<domain:hostObj>ns2.hexonet.net</domain:hostObj>
<domain:hostObj>ns3.hexonet.net</domain:hostObj>
</domain:ns>
<domain:registrant>USER</domain:registrant>
<domain:contact type="admin">SERVICE-C1</domain:contact>
<domain:contact type="tech">USER</domain:contact>
<domain:contact type="billing">USER</domain:contact>
<domain:authInfo>
<domain:pw>2fooBAR</domain:pw>
</domain:authInfo>
</domain:create>
</create>
<clTRID>HEXONET-EPP-EXAMPLE</clTRID>
</command>
</epp>
RESPONSE
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<epp xmlns="urn:ietf:params:xml:ns:epp-1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:ietf:params:xml:ns:epp-1.0 epp-1.0.xsd">
<response>
<result code="1000">
<msg>Command completed successfully</msg>
<extValue>
<value xmlns:epp="urn:ietf:params:xml:ns:epp-1.0">
<epp:undef/>
</value>
<reason>200 Command completed successfully</reason>
</extValue>
</result>
<resData>
<domain:creData xmlns:domain="urn:ietf:params:xml:ns:domain-1.0" xsi:schemaLocation="urn:ietf:params:xml:ns:domain-1.0 domain-1.0.xsd">
<domain:name>hexonet-epp-example-domain-with-service-contact.uk</domain:name>
<domain:crDate>2014-05-01T08:30:29.0Z</domain:crDate>
<domain:exDate>2016-05-01T08:30:28.0Z</domain:exDate>
</domain:creData>
</resData>
<trID>
<clTRID>HEXONET-EPP-EXAMPLE</clTRID>
<svTRID>RW-26558-1398933029905984</svTRID>
</trID>
</response>
</epp>
EPP example of a check if a registrant is eligible to register a 2nd. level .UK domain name that is subject to a right of registration of a 3rd. level .UK domain name. In this example the registrant is eligible:
COMMAND
RESPONSE