Thing eventually happened in our holiday is we doing our life in different way than in home. Everything changed, from how we eat until how we drive. But something we must not change in a holiday or not is choosing our baby sitter.
But, is is almost impossible to check background of every baby sitters in the hotel. You must trust that the hotel has already choose every of it's employee by using the same method that you use in your home. Most hotels do that, especially the hotel with a good standard.
You still need to do the selection step. Parents who are having holidays needs to meet with the Baby sitter. Introducing this baby sitter to the child and see the child interaction with the baby sitter. Ask the baby sitter what will she/he do when there is a fire. Does he/she knows about emergency breath helps? does he/she know about emergency numbers? And make sure you leave your number which can be called, as example the restaurant number which will be you visited.
Most important, remember that you must not always hire a baby sitter form the hotel. If you does not want it, ask the hotel to sent another person. You need to make sure that your children is happy and safe while you are away. Especially when you are in a foreign place.