Most posters aren't made specifically for collecting. That is, they're primarily a form of disposably advertising, which is why they're written on, folded, ripped, etc.

Movie Poster Blemishes: Tears - Tears are rips in the poster where both sides are still there and you can match up the image/poster

Movie Poster Blemishes: Stains - Stains usually refer to some type of liquid (water, coffee, soda, etc.) that was spilled on the movie poster.

Marks - A mark refers to anything that was written on the poster - ink, pencil, paint, etc.

Holes - Holes are just that - holes that go all the way through the movie poster.

Folding - While some older posters from movie companies were folded, the typical way to send them now is rolled into a tube.

Bleed-thru refers to being able to see marking made on the back of a poster on the front of the movie poster after the ink (grease pencil, marker, etc.) soaks into the paper and 'bleeds-through.'

Bleed-thru refers to being able to see marking made on the back of a poster on the front of the movie poster after the ink (grease pencil, marker, etc.) soaks into the paper and ''bleeds-through.''

Fading - Having a poster in direct sunlight for extended periods of time can cause the poster to fade.