Sold my house 4 years ago. Used yopa first but had very few viewings not good. Changed to high street agent great service and house was sold. Recently had a debt collectors emailing me they I owed yopa a fee which is £1995 apparently for the introduction of the eventual buyer. So it took 4 years for to process this. Now being threatened with court if I don't pay. I had no clue about this. Is this legal? Does anyone know? It's a dastardly deceiving way of doing business. Sharks.