Deduction under 80g

I received form 16 from client . There was a deduction under 80G. On asking the details, client said it was deducted from his salary for conttribution on the death of staff of his office. Now, is it eligibile for deduction? If yes, what details should be filled in ITR 1 to claim deuction? if not, why is it appearing in form 16? 

Thanks in advance