If you have attempted to add an equine to your Digital Stable using either its passport number and/or UELN and a result cannot be found this would indicate that your equine's record may not be on the Central Equine Database (CED).
You will need to contact the Passport Issuing Organisation (PIO) that issued your equine's passport to ask them to check their records and/or add your equine to the CED.
If an equine's passport was issued outside of the UK, it is the responsibility of the owner at the time of importing the equine to register the equine with a UK PIO.
Contact details of UK PIO's can be found in this link; Horse passport issuing organisations in Great Britain and Northern Ireland - GOV.UK (www.gov.uk)
If you are not sure who your PIO is and don't have the passport but you do have the UELN, you can use the guide below to identify your PIO by using the first 6 digits of the UELN.
http://help.equineregister.co.uk/equine-passport-issuing-organisations-pio-s/find-pios-contact-details-using-ueln
If you need any further help, please contact us at customerservice@equineregister.co.uk