2014hopeful

I had to forward formal certification of my exam results to Yale as an international student, and I am worrying that this may have been lost in transit by airmail. It was sent direct to Yale from two separate exam boards but I stupidly didn't request DHL delivery and so have no way of knowing whether Yale received this without calling them.

Is it ok for me to call up the admissions office about this? I don't want to annoy them but it is kind of important...