The hotel has a card after receiving the invitation.

After receiving the invitation, there was a card in the hotel: Ignore this card.

The reason why there are small cards in the hotel is actually very simple.

Small cards don't appear for no reason. Someone stuffed it into the room.

But hotels usually have cameras in the corridors.

The hotel didn't stop it, and many times it had a cooperative relationship with the hotel. Hotels can also get some benefits from it, and then someone will be allowed to put a small card in the hotel.

To make matters worse, when you check into a hotel, the front desk will call you to ask if you need service.

In this case, it is best to refuse.