| Republic of Ireland: | 1800 726 772 |
| Northern Ireland: | 0800 072 6772 |
| International: | +353 1 237 0584 |
The SEMO Helpdesk is available Mon-Fri from 9.00am until 5.00pm. We operate a voicemail service if we are unavailable.
| Phone Number: | +44 (0) 28 90 707415 |
This should only be used for emergency operational issues relating to Limited Communication Failures (LCF). The process for declaring and submitting a LCF can be found on the SEMO website.
The Hotline is available 24/7 on an interim basis.
The latest LCF procedure and supporting LCF tool are available to download.
Fax: +353 1 526 6416
Fax: +44 2890 707555
If you are unhappy with the quality of service you have received, you have the right to complain. Please direct these complaints to info@sem-o.com for the attention of the Front Office Manager. An escalation process will be initiated and your complaint will be addressed.
As per the Trading & Settlement Code participants may raise a dispute in respect of a Settlement query – please see Agreed Procedure 14 – Disputes.
For further information, view SEMO's full Customer Charter.