Dear,

You need to attach the following documents along with the application form to get SC/ST certificate in Delhi:

1. Application Form
2. Adhaar Number if it is not available, provides anyone identity proof such as Pan or Passport or Driving Licence or Voters Card
3. Copy of SC/ST certificate of father, sister, brother or of his/her blood relative from the paternal side.
4. Self-declaration in case of SC/ST certificate issued from outside Delhi in prescribed Performa rate (If the children are below the 18 years, a self-declaration from the major have to be produced)
5. Marriage Certificate for married women
6. Present residential proof like Voters Card, Water Bill, Electricity Bill, Telephone Bill etc.
7. Proof of Date of Birth

Hope this helps!