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If you are paper mailing many of your COA apps, is it looked down upon to send your LORs in the envelope with all of your materials if all of your professors/ previous employees sent you a copy of the letter?

I had done this to get my district court clerkship and am a little worried because many people on this thread have said it must be "sealed" or "under separate cover." We do not really have a robust or attentive clerkship office at my school, also.

I did this and received several invitations for interviews. I did not receive any indication that my application was not well-received because I did that. (Like you, I did not have a great clerkship office at my law school.)