80 g deduction

I received form 16 from client. There was a deduction under 80g. On asking the details he said it was deducted out of his salary as a contribution on the death of staff of his office. Now, is it eligible for dedction? if yes, what details to be filled in ITR 1 to claim deduction. If not, why is it appearing in form 16? pls help.

thanks in advance