My wife and I lived in the Valencia region from 2004 to 2006. I was self-employed. We are looking at moving back to Spain (somewhere around La Zenia) in the next couple of years - post Brexit.
Looking back through our old paperwork I have found that we both have NIE numbers, Social Security Numbers and I have a plastic SIP card.
I know that the NIE numbers are still valid as we nearly brought a house at the start of Lockdown (put backed out). According to the internet the Social Security Numbers are valid for life too. I'm not sure about the SIP card though. It has a start date, but no end date, and I think it was only valid while we owned the house in Valencia.
Will any of these cards / numbers help us when we move out to Spain again? Is there anything we can do before Brexit to renew / extend them? Any other advice would be gratefully received. TIA.