Black rot?
 

My orchid came home and I noticed these darken tip on the leaves. I have never encounter black rot before but this seems suspicious to me. This one is epidendrum kockii and the second one is a mesdevalia.

For the Masdevallia it looks like fungus has entered a puncture in the leaf. The puncture could have been from a bug or a scratch.

Did you let the Epidendrum get dry? That looks like what happens to Cattleya alliance plants when they don't get enough water.

These came to me from ecuagenera. The epidendrum was dehydrated but at the same time the young growths were quite squishy and the roots were blacken dries. I'd rather it dried than a fungus. :(

fungal rot from heat stress being too hot and wet inside a box. they ship the plants wet then they sit too long in the dark heat. that where it starts.