https://ficoforums.myfico.com/t5/Credit-Cards/Authorization-Codes/m-p/3916371#M1094408 <P>I've often layed awake all night pondering this very subject.&nbsp;&nbsp; (Hope you know I'm just playing with you). <img id="smileyhappy" class="emoticon emoticon-smileyhappy" src="https://ficoforums.myfico.com/i/smilies/16x16_smiley-happy.gif" alt="Smiley Happy" title="Smiley Happy" /></P> Tue, 07 Apr 2015 12:03:26 GMT Anonymous 2015-04-07T12:03:26Z https://ficoforums.myfico.com/t5/Credit-Cards/Authorization-Codes/m-p/3915735#M1094198 <P>Anyone ever look at the authorization codes on their receipts? Seems like they are all different...yet the same. All my citi purchases end with a Z (i.e 48394Z). My Sapphire ends with an A (008014A). Amex always starts with a 5 and has all numbers. PenFed, if I remember right, has 006 to start with. &nbsp;Just thought it was interesting.</P> Tue, 07 Apr 2015 01:26:41 GMT https://ficoforums.myfico.com/t5/Credit-Cards/Authorization-Codes/m-p/3915735#M1094198 Anonymous 2015-04-07T01:26:41Z https://ficoforums.myfico.com/t5/Credit-Cards/Authorization-Codes/m-p/3916371#M1094408 <P>I've often layed awake all night pondering this very subject.&nbsp;&nbsp; (Hope you know I'm just playing with you). <img id="smileyhappy" class="emoticon emoticon-smileyhappy" src="https://ficoforums.myfico.com/i/smilies/16x16_smiley-happy.gif" alt="Smiley Happy" title="Smiley Happy" /></P> Tue, 07 Apr 2015 12:03:26 GMT https://ficoforums.myfico.com/t5/Credit-Cards/Authorization-Codes/m-p/3916371#M1094408 Anonymous 2015-04-07T12:03:26Z