True, you don't have to tell them. But in order to have privacy for a moment you need to lock yourself in the bathroom? It does make some of us wonder if you're in the best situation, you see.
Back to the shrooms in question, what were you told they might be? Did you see the specimens before they were dried? Were they collected from a natural location? Were you able to take a spore print? Do you have access to a microscope?
Have you tried them yet? Dried Psilocybe cubensis needs to be kept in a bone-dry, oxygen-free container in the freezer if stored for any length of time, otherwise it tends to lose potency pretty quickly.