THE RPTR DELIBERATELY TAXIED AWAY FROM THE GATE 500 LBS LESS FUEL THAN MINIMUM IN ACCORDANCE WITH HIS UNDERSTANDING OF APPROVED AIRLINE COMPANY PROCS.

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ACFT FUELING AT GATE IS NORMALLY DONE. BUT DID NOT PUT ON TOTAL REQUIRE QUANTITY AS HE RAN OUT OR HAD TO LEAVE FOR SOME REASON. I (CAPT) CAME IN COCKPIT; FO AND I RAN CHKLIST AND I SAID -- THEY SHORTED US ON THE FUEL -- HOWEVER; OUR COMPANY RECENTLY PUT OUT A FLT OPS LETTER SAYING IT IS OK TO DEPART WITH 'UP TO 500 LBS FUEL DIFFERENCE' FROM RELEASE FUEL; AS IT WAS JUST UNDER 500 LBS. I PUSHED BACK REALIZING WE WOULD TAKE OFF WITH LEGAL TKOF MIN FUEL SINCE THERE WERE NO DELAYS (WHICH WE DID). HOWEVER; AS WE WERE PUSHING BACK; THE FUEL TRUCK PULLED FROM SIDE OF THE ACFT AND THE FUELER TOLD THE MECH. PUSHING US BACK HE HAD A LITTLE MORE FUEL TO PUT ON. THE MECH ASKED US; 'DO YOU HAVE ENOUGH FUEL?' I AND FO RECHKED AND SAID YES AND PUSHBACK CONTINUED. THE REASON I AM WRITING THIS IS BECAUSE WE AT THIS AIRLINE HAVE HAD MANY MISFUELING INCIDENTS. 1 ACFT DEPARTING WITHOUT REQUIRED FUEL AND ONE CASE TOOK PLACE AT LGA AND INVOLVED A MECH AND PLT. SINCE MECH MAY NOT KNOW WHOLE STORY (500 LBS DIFFERENCE ALLOWED). I WANTED TO WRITE THIS TO CLASSIFY SIT IF HE RPTS SOMETHING INCORRECTLY.