In my experience, regardless of your CIBIL score or income, if you've had a supplementary card previously—meaning the primary cardholder was your dad, mom, or a family relative—and kept the card active for as long as possible before canceling and reapplying after six months, you may not need income documentation for any of the top three cards, except for the Platinum Charge (because I haven't applied for it yet). That's one sure way, as everyone I've referred had to upload income documents, whereas I had a supplementary card in my name from 2015 to 2019. Now, I hold all three: Gold, Platinum Travel, and MRCC