The "Skammen" poster changes between shots several times. When Emad returns to his apartment, the poster is fully visible. A few scenes later when his wife goes to the room, a yellow poster covers the poster, making only the letters "Ska" appear. A third future shot reveals only an "S" behind the yellow poster.
Iranian actresses are not allowed to appear without hijab. And Iranian women don't wear hijab in their home. Farhadi always find a way to solve this problem, such as there always being a stranger in the house, but in the scene in which Rana is cleaning the house she is all alone and still wearing a hijab.
At the beginning of the movie, people are leaving the apartment building because it is dangerous and there is a risk of collapsing. But the following days they can easily enter the building and there is no police/municipality line tape in front of the building to prevent people from entering the dangerous area.
How it is possible someone (the old man) with heart problems can run away and no one can get this?
The old man was in rush to leave, so he forgot his car keys and couldn't take the car at that moment. But some days later, he comes and takes the car, which means he had a duplicate key. The question is why he didn't come back for the car during the middle of the night. Emad found the car the next day morning or noon.