SEPA Originator Identification Number (OIN)
Under SEPA, the Credit Transfer OIN (Originator Identifier Number) will be known as the SEPA Originator ID. The SEPA Originator ID is your unique identifier number and must be used when submitting files for processing.

Your Business Banking Service is responsible for the issuing of your OIN Number.

The following guides and applications are what is provided by the banks online. Please confirm with your Business Banking Service of the latest application version and/or requirements for your particular account.

BANK OF IRELAND 

• BOI General FAQs for Online Banking: https://businessbanking.bankofireland.com/business-online-payments/faq/general/
• BOI SEPA Credit Transfers Originators Guide  https://businessbanking.bankofireland.com/app/uploads/1956173_1562399-SEPA-Credit-Transfers-Originators-Guide-a__-June-21.pdf 

AIB

• Business Banking: www.aib.ie/ibbuserguide
• Application forms https://aib.ie/business/business-login/ibb-forms 
• Payment Files - Credit Transfers Application or Amendment: https://aib.ie/content/dam/frontdoor/business/docs/files/payment-files-credit-transfers-application-and-amendment.pdf
• How do I upload a Payment file?: https://aib.ie/business/help-centre/manage-my-payments/how-do-i-upload-a-payment-file