What it is
A formal guarantee issued by a bank on behalf of a customer. In property transactions, bank guarantees are often required by developers off-plan: if the development is not completed, the bank returns all stage payments to the buyer. This is a core term in the Costa del Sol property purchase process and one buyers frequently encounter during due diligence.
Why it matters for international buyers
Understanding Aval bancario is part of the standard due diligence framework for any foreign buyer purchasing on the Costa del Sol. A Spanish property lawyer (abogado) will handle the mechanics, but buyers who understand the term can ask better questions and interpret advice more accurately.
This entry is reviewed by the Listyco editorial team. It is not legal advice; instruct a Spanish lawyer for your specific position. Last reviewed April 2026.