All businesses

• All businesses that import, export or move their goods and materials from or through the UK need to register with Revenue for a customs number (EORI number). This applies irrespective of the volume or value of trade undertaken.
• All businesses should review their supply chain to assess how it may be affected.
• Check if your business relies on products or services that are certified to conformity with EU regulations and standards by a UK body. These certificates or licences may no longer be valid in a no deal scenario and you will need to take the necessary steps to ensure compliance with EU regulations and standards. For further information, please see certification and licensing.

Businesses importing directly from the UK

• Businesses need to prepare for any new customs arrangements and regulatory checks and the impact they will have on their business. 
• Further information is available from Government of Ireland, is regularly updated with the latest developments so do check back regularly.