Usually, aside from drafting the divorce petition, you will need to have some additional documents available. You may need original documentation, including:
your marriage certificate;
birth certificates of any children;
prenuptial agreements;
mortgages; and
outstanding loans taken out during the marriage.
If you are filing for child support or spousal support, you may also want to have documentation related to:
your and your child’s regular expenses, including some receipts if available;
your and your spouse’s income from employment, investments, etc.;