Yes, someone can stay overnight for part of the stay. However, it must fit within the maximum number of people in the accommodation. So if you stay in a 4C 4-person accommodation, a maximum of 4 people can stay. No extra beds can be placed.
If you are expecting a guest, you can easily indicate this under 'Travel company' in your account. We ask you to indicate guests in connection with a contribution for tourist tax and bed linen. You can add and remove guest(s) up to 1 day before arrival. If you still want to bring someone along on the day of arrival, or want to remove them, please contact the Contact Centre. If someone only visits during the day, you do not need to report them.