Del. Code tit. 12, § 3121

If in an action against an executor or administrator for a debt against the decedent the affidavit required by § 2104 of this title is not produced by the plaintiff, the action shall, upon motion, be dismissed and if such action has been brought, without previously exhibiting to the defendant an affidavit in due form, the plaintiff shall not recover any costs, unless the action has been controverted. The question of disallowance of costs shall be decided by the court on a rule to show cause, which shall not be granted unless the exhibiting of an affidavit be denied on oath or affirmation.