When entering Sweden directly through an airport such as Arlanda, there's an option to provide a "written invitation" in case the person does not fulfil the monetary entry requirements of a certain amount of money per day. However, due to some circumstances, the person who will stay with me is arriving via Copenhagen Airport (Kastrup) in Denmark to then transfer to Sweden by train right away without staying in Denmark overnight. As such, they will have to go through the Schengen border control in Denmark.
Is it possible for me as a Swedish citizen to provide a written invitation in a situation like this, or do they need to fulfil the monetary requirements Denmark has set? If I can provide a written invitation, is there any form to fill in or other guidance I could use in this situation?