Most Noritsu and some Frontier machines imprint a status string on the back of the prints that provides an indication of the print settings. If the status string exists, it may contain a series of numbers or letters, then the sequence N N N N followed by more numbers and letters. If any of the single "N" characters has a "+" or "-" sign following it, this shows one or more color channels was set to an adjusted value. For example if the string is N N N+2 N, one channel was bumped two notches. Tell the lab to reprint your files. This is also a useful check when you print files using a profile. Do not be concerned if there is no status string. Many labs do not print one.
Noritsu specific status strings: An example status string is as follows:
8121 11 N N N N NN AS+02 Zxxx/xxx
    
Field  can contain any of a number of pieces of information, including date, order number, etc. None of this directly pertains to the printing mode.
Field  has the print color channel information. Values other than a single N, with no "+" or "-" sign, indicate that a print channel was adjusted. Have your files reprinted without corrections.
Field  should always be NN, "---", or simply not be present for digital media. It relates to the film scanner module settings.
Field  will often not be present. That is ideal no automatic adjustments were applied. If it does appear, the most common codes are "AS" and "AC" which stand for Automatic Saturation and Contrast. If these, or any other code is present with a "+XX" value, ask for the target to be reprinted with all Media Corrections and DSA (Digital Scan Adjustment)/Judgment Image Correction settings disabled.
Field  contains cropping status and may or may not be present. Its value does not matter