Yes. Estate agents are named in Art. 2.1 lit. l) Ley 10/2010 as sujetos obligados (obliged entities). What counts is where the agency work is carried out — not the company's language or the clients' nationality. An agency operating in Spain falls under Ley 10/2010 and its due diligence obligations (diligencia debida), even if most of its clients come from abroad.
SEPBLAC can impose sanctions. The amount is graded by severity: minor breaches up to €60,000, serious breaches up to €5,000,000, very serious breaches up to €10,000,000 or 10 % of annual turnover (Art. 56–58 Ley 10/2010).
Yes. The entire buyer flow is designed for mobile use.