surprising querry

DEAR FREIND,

ONE OF MY NEW CLIENTS HAS TWO PAN NO.ONE THAT HE HAS RECENTLY OBTAINED AND ANOTHER HE HAS ONLY PAN NO. BUT NO CARD COPY OR LETTER.

SO WHAT I CAN DO FOR CONFIRMING THAT OLD PAN NO HAS BEEN ALOTTED TO THE SAME CLIENT WITHOUT ENQUIRING TO INCOME TAX DEPT.

I NEED UR HELP.

THANKS.