I have never seen an official Efficiency Report.

Every once in a while, we'll run across an individual card in a man's file reading:

W. H. D. Huff
2nd Lieut., Co. D, 22 Reg't Alabama Infantry.
Appears on a

Report

"showing efficiency and competency of Field, Staff and Company Officers of 22d Ala. Regiment,"
for ...... August , 1863
Report dated Near Chatttanooga, Tenn., Sept. 1st, 1863.
Remarks: Poor officer

This is the sum total of what we see and it is rather rare one crops up.