Posted: Fri Feb 12, 2021 9:02pm
Hi Carole,
I've checked both the Gov.UK and Gob.ES websites, and neither specifically say it has to be the original document. This is from Gov.UK:
"Additional requirements for UK nationals resident in Spain
"If you are resident in Spain, you should also carry the appropriate proof of residency documents as well as a valid passport when you travel. Spanish authorities have clarified that either the A4-size or credit card sized green EU registration certificates, the “Certificado de Registro de Ciudadano de la Unión Europea”, or the new TIE card, the “Tarjeta de Identidad de Extranjero” are valid proof of residency for UK nationals who wish to return to their homes in Spain.
"The Spanish authorities have not confirmed whether other documents are being accepted as sufficient proof of residence to enable entry to Spain. We strongly advise that you contact your airline before travelling to confirm your proof of residency meets the requirements of your airline."
https://www.inclusion.gob.es/ficheros/brexit/nota_aclaratoria_green_certificate.pdf
Kind regards,
Kim