Spain Advisors - Spanish ID Numbers for Foreigners Let's define them: NIE. This means 'Numero de Identificación de Extranjero' (Foreigner's Identification Number). This is for Non-Spanish citizens. It's a taxpayer identification number
Step-by-Step) How to Become Self-Employed in Spain
Converting The Non-Lucrative Visa To A Self-Employment Visa — Tapas Forever
How to become self-employed in Spain (autónomo) | Freelancer in Spain - YouTube