Kernrechtsfrage
Whether the conditions for definitive debt enforcement were met despite contested service of the tax objection decision.
Extrahierter Entscheid
The creditor failed to prove proper service and enforceability of the objection decision; the decision could therefore not serve as a valid enforcement title.
Extrahierte Begründung
A decision not duly served has no legal effect, does not enter into force, and cannot be enforced. The creditor bears the burden of proving enforceability and service; a finality certificate cannot cure defective service.