How is the invalidity of a will asserted?
Interested heirs may file an action for annulment of the will on the ground that the formal requirements were not met, or that the deceased lacked testamentary capacity.
This question fits the pattern:How Is It Done?
In-depth guide on this topic: Renouncing an Inheritance in Türkiye: Conditions, Deadline and ConsequencesThis answer is provided for general informational purposes and does not constitute legal advice. Consult a lawyer for an assessment specific to your situation.