<p>I know this sounds a little inane and there is nothing I can do about it, but I still want to settle this uncertainty.</p>
<p>All my teacher recs, school reports...are not signed when being sealed. I just noticed this today when looking at the reports my friend received from other teachers.</p>
<p>Will this make them regard the materials as being less valid?</p>
<p>There are some schools where it is a requirement. Those make such a requirement clear. It would most likely have been clear enough for the people sealing the envelopes to have noticed; no worries.</p>