When departing from your hotel room, it’s ok to take those little shampoo tubes, but nothing else. If you do, according to British news service The Sun, your name may be placed on a no-stay list.

If your hotel is an international chain, that could mean you’ll be blacklisted worldwide from future check-ins in England, Brazil, Japan, the USA and who knows where else. While that pillowcase or towel you swiped may be worth just a couple of dollars, it multiplies into millions of losses every year to hotel budgets.

Also, don’t go into your little hotel room fridge unless you intend to buy any of the grossly-overpriced products inside. When you open the fridge door, even if you don’t take anything out, it may automatically add a charge to your bill.