It is correct.
It can go either way:
"Make sure you are GIVEN a receipt for everything you buy."
"Make sure you RECEIVE a receipt for everything you buy."
"Given" in this sentence is referring that the EMPLOYEE gives you a receipt. So it's in the employee's point of view when the person is telling you the sentence.
"Receive", if switched to replace "given", in this sentence would be referring that YOU get a receipt from the employee. So then the sentence would be in your point of view when the person is telling you the sentence...
I hope that explains it a little better for you. I'm in a rush so I would probably have given you a better explanation if I wasn't in such a hurry! Ah!!! See! I just used "given" like it was used in your sentence!!! Maybe that will help you a little bit more??? :)