The additional fee for the third person was not declared during the initial check-in process. Upon booking, I had explicitly stated that there would be two adults and one child, totaling three. However, I was surprised to find that the room rate only covered two individuals, one adult and one child, with an extra charge for the second adult that was not advertised on the app. If I had been aware of this initially, I would have chosen not to book this hotel. To maintain transparency, it is crucial that such charges be clearly disclosed to avoid misleading guests with hidden fees.