The commission must investigate which type of complaint?

The commission is required to investigate any written verified complaint because such complaints provide a formalized and documented approach to reporting issues. A written complaint signifies that the individual has taken the time to articulate their concerns clearly and in detail, thus allowing the commission to properly assess the situation. Verified complaints often include necessary details like parties involved and specific incidents, which are essential for conducting a thorough investigation.

In contrast, verbal complaints may lack sufficient detail or documentation, making them harder to investigate effectively. Anonymous complaints, while they can raise valid issues, often cannot be pursued because they do not provide a way for the commission to follow up or verify information. Complaints filed exclusively by homeowners would also limit the scope of investigation and exclude other parties who may have valid concerns, thereby failing to fulfill the commission's obligation to address broader complaints within the jurisdiction.