In the hospitality industry of 2026, it is a standard policy that at least one adult (the primary guest) must be present to provide a valid ID and a credit card for incidentals. However, many hotels—especially in high-security regions or international destinations—require all guests staying in the room to present themselves at the front desk to have their passports or IDs scanned, in compliance with local law and anti-human trafficking regulations. If you are using "Digital Key" technology via a mobile app, the primary guest can often bypass the desk entirely, but adding additional guests to the digital key often requires their verified presence or pre-registration. In some luxury resorts, only the lead guest needs to check in while the rest of the party relaxes in the lounge, but from a strictly legal standpoint, the hotel must account for every soul in the building in case of an emergency evacuation or fire.