You have the option of taking the dispute to court. The court then issues a binding ruling which you and the other party must comply with. Proceedings will be instigated in the first instance before the sub-district court or the civil court. Which court you go to depends on the kind of case or the value of the case.
Truth is the first, and easiest, defense to a defamation claim. As discussed in the elements of defamation, the statement about you must have been false. If a Defendant can show that the statements were true, or even substantially true, then they could defeat a claim for defamation.
The Dutch Criminal Law seeks to protect the moral integrity of a person by forbidding slander and defamation (Articles 261 and 262 of the Dutch Criminal Code). Both slander and defamation consist of an intention to impugn the honor or reputation of another person by accusing a person of a fact in the public eye.
Truth, or substantial truth, is a complete defense to a claim of defamation.
The most common defenses to defamation are: 1) truth; 2) consent; 3) privilege; and 4) the statute of limitations. Perhaps the most distinct aspect of the defamation cause of action is that falsity is required.
Truth is widely accepted as a complete defense to all defamation claims.
Truth is an absolute defence to defamation. The defendant must prove that the defamatory statements were, in fact, true. For instance, if the statements concern the quality of goods or services, the defendant could provide independent testing or other evidence supporting the truth of the claims.
If you decide to do it alone, your letter should state the specific defamatory statements made, confirm that they are defamatory, indicate the reputational harm caused, demand an apology and retraction of those statements, and demand that they cease making further statements failing which you will sue them.