Proof of identity (driver's license, etc.), alien status.
Social Security Numbers for all household members.
If employed, proof of income (wage stubs, earning statements, etc.) for the past 30 days.
Bank statements for checking accounts, savings accounts, certificates of deposit, credit union accounts, retirement accounts, stocks, bonds, dividends, etc.
Proof of shelter costs (rent or mortgage payment, lot rent, household, real estate, taxes, utility bills – heat, electricity, water/sewage/garbage, telephone, etc.)