Endorsement of incoming communication

I am just wondering why work at the office the past months just get a lot. Sometimes I cannot choose which one to prioritize. Well part of being in the human resource department.  This time I am tasks to do the endorsement of incoming communications. The different kinds of letters received by the head of office are being segregated on where will it be endorsed depending on its content. It is just easy to do it for me but with bulk of it, I need to prioritize especially with its sue dates.