Hra claim

Dear Experts,

Kindly advise me on the following. My son is employed with a small company and is drawing salary. He stays with me and goes to his office by cab and returns by cab. How to claim HRA although he stays with me. We both have separate bank a/cs, can I ask him to pay regularly on monthly basis to my a/c or anything more is required to be done. 

Thanks for your usual cooperation.

GR Babu