Narasaiah-Narra If TO is less than 20 Lacs,GST regn is not required. But the service recipient is required to pay GST as purchases from unregistered dealers. this would increase their compliances. hence, they are insisting you to get the GSTIN.As your party will reimburse the GST to you , no extra cash outflow from your pocket.but you have to file monthly returns etc .
Note: Rediff will never share your number with any company for marketing purpose.