You can get an Additional or Supplementary Cardmember added to your account, simply click here and fill in your details on the form. and send it with required documents to email@example.com.
You can also full up the application form form the Welcome kit and courier to: Supplementary Cards,
American Express Banking Corp.
Cyber City, Tower C, DLF Bulding No 8, Sector 25,
DLF City Phase II Gurgaon,