The following are the primary documents you will need while filing a divorce case in Delhi:

1. Marriage Certificate: A marriage certificate serves as proof of the marriage and is necessary for initiating the divorce process.
2. Address Proof: Address proof of both spouses, in the form of valid proof of residence, such as utility bills, bank statements or government-issued IDs is necessary.
3. Identity Proof: A government-issued ID like an Aadhaar card, passport, or voter ID is required for the identification of both spouses.
4. Photographs: Recent passport-sized photographs of both parties are typically needed for legal filings.
5. Proof of Income: Documents showing financial stability or instability of both parties, such as salary slips, income tax returns, or bank statements may be required, especially in cases involving alimony or child support.
6. Grounds for Divorce: A written statement outlining the reasons for the divorce is also necessary.
7. Other Relevant Documents: Depending on the case specifics, additional documents may be needed, such as evidence of any domestic violence, proof of separation or child custody arrangements.

Consulting an advocate in Delhi for divorce cases can help ensure that you have all the necessary documents and understand the legal requirements.