Article 6 ServiceI1

After the summons is issued, it must be served on the relevant party without delay by sending it by first class post to the relevant party’s last known address, and the date of service is, unless the contrary is shown, deemed to be the seventh day after the date on which the summons was posted.

Where any process or order of the court or other document is required under proceedings subject to these Rules to be served on any person who is not in Northern Ireland, the court may order service on the person of that process or order or other document to be effected within such time and in such manner as it thinks fit, and may also require such proof of service as it thinks fit.