If you are heading toward a divorce, a custody dispute, or any other family law claim in Spain, there is a new step you now need to take before you can even get in front of a judge.

Spain's Organic Law 1/2025 makes MASC (Medios Adecuados de Solución de Controversias, meaning "adequate means of dispute resolution", essentially mediation or negotiation) a mandatory step before filing many civil claims, including family law cases. In practice, this means you can no longer go straight to court. You have to show you tried to negotiate first.

This applies directly to divorce proceedings, disputes over parental responsibility, and requests to modify existing custody or support arrangements. If you cannot prove you attempted this prior negotiation, your case can be thrown out as inadmissible, regardless of its merits.

Why this matters more if you are an international family

The reform creates particular problems for cross-border situations, for example when one parent lives in Spain and the other lives abroad. Spanish courts may still be the right venue to hear the case, but the Spain-based party is now required to attempt MASC before that case can even be filed.

This raises real practical difficulties:

  • The negotiation requirement applies regardless of where the case should legally be decided
  • It adds cost and complexity, especially when both parties are in different countries with different legal systems
  • It is often unclear which rules govern that negotiation phase when a foreign country is involved

In high-conflict cases, especially those involving children, this extra step can be genuinely harmful. It can delay urgent protection a parent or child needs, and it can be used by one side simply to stall the case. It also assumes both parties are able to sit down and cooperate, which is often unrealistic in a family conflict. The law does carve out some exceptions, such as cases involving gender-based violence, but these exceptions are narrow and do not address the wider problem.

What this means for you

If you are considering a family law claim in Spain, especially one that crosses borders, build in time and a plan for the mandatory MASC step before you file. Getting the right legal advice early can help you meet this requirement properly and avoid delays to getting the protection you need.