When applying for an American Express® Credit Card, you will need to provide proof of identity, address, and income. Acceptable identity proofs include a PAN Card, Aadhaar Card, Passport, or Driver's License. For address proof, you can submit documents like an Aadhaar Card, utility bill (not older than 3 months), or bank statement. Income proof typically involves submitting your latest salary slips, Form 16, or the last three months’ bank statements.