To make a formal complaint to a hotel in 2026 effectively, you should follow a "layered" approach. First, address the issue immediately at the front desk; hotel staff would much rather fix a problem (like a broken AC or a dirty room) while you are on-site than hear about it after you leave. Ask to speak with the Front Office Manager or the "Manager on Duty." If the resolution is not satisfactory, document everything—take photos, note the names of employees you spoke with, and keep copies of your folios. Upon returning home, send a concise, professional email to the General Manager (GM) of the specific property. In 2026, many travelers also use "Corporate Customer Relations" forms for major chains like Marriott or Hilton, as these are tracked at a higher level. If the hotel is independent or unresponsive, your next step is a polite but firm post on a major review site or social media, as "Social Listening" teams often have more power to issue refunds or points than front-desk agents. Always be clear about your desired outcome: are you looking for a refund, loyalty points, or just an apology?