These will be later taken out during the game.
You being the host, will keep this bingo card. Take out one bingo card that will be used as an extra bingo card and remove all the squares from it.A sticker, pen, or highlighter is perfectly fine, and you can use it for markings. You will need something for the bingo square to be marked.
As this bingo has printed cards, the cards will be sturdier, and it will make it easier to play and use. You’ll have to print individual bingo cards for each guest.