Real Estate Solicitor. Claim in Spain for the agent commission and fee when the purchase has not been completed. Posted on April 16, 2012 (September 10, 2020) by Carlos Baos Clik the link to our blog: Real Estate Law in Spain. Agent’s fee and commission. Should be paid the agency if the sale does not end in the total payment or by signing the Notarial Purchase Deeds Escritura?