<prompt> Translate the following text to EnglishUchunguzi huo ulijumuisha hatua kadhaa, hasa kuzingatia kulinganisha habari juu ya nyaraka tatu muhimu - wajibu au agizo la hati, kupokea na ukaguzi hati kwa kawaida inaitwa ripoti ya kupokea, na ankara.  <response>: The examination consisted of several steps, primarily focusing on comparing information on three critical documents-the obligation or ordering document, the receiving and inspection document normally called a receiving report, and the invoice. 