Sharpie Oil-Based Paint Marker, Extra Fine Point, Gold Ink, Pack of 3

I only received 2 markers who do i contact about the 3rd?

Would these be allowed on Christmas envelopes? (Like sending them through USPS?)

How “fast drying” are these? the oil paint makes me nervous. wanted to use these for ppl to sign the wood leaves for our “guestbook” tree. tyia

Will rubbing alcohol take it off glass?