Key facts: The WA Statutory Probate Rules Code governs all will contest procedures in Washington State; interested parties must file objections within prescribed statutory timelines; the 30-day waiting period following death is required before probate admission; estates exceeding the $50,000 value threshold are subject to standard probate procedures; contestants bear the burden of proof by clear, cogent, and convincing evidence; standing requirements extend to beneficiaries, heirs at law, and creditors with pecuniary interests; grounds for contest include lack of testamentary capacity, undue influence, fraud, forgery, improper execution, and revocation.