There is a protocol to be respected but it is not ...

There is a protocol to be respected but it is not known how to announce and who to deliver the cards. If you ask for information you are unwelcome and you must know in advance their procedures for the exchange of recipes, receipts and booking numbers.
Hope to find the doctor / nurse in a good mood and someone who will explain what to do to be received .... the rest will think the experience if unfortunately you have to come back several times.