Contact us
Contact Us
SEMO Helpdesk
| 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.
SEMO LCF Hotline
| 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.
Complaints Procedure
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.