Sometimes, the marketplace is able to verify your identity using their internal data sources without documentation provided. However, it is always best to have identification in case the marketplace needs to verify your identity or immigration status. You may also need to submit proof of your residency in a state or geographic region. This can be done by providing a lease or mortgage document, utility bill, or government issued identification with your current address. You may also need to provide proof of your income if the marketplace is unable to verify your income through IRS or Social Security data sources. This can be in the form of pay stubs, a letter from your employer, or a tax return. If the marketplace determines you are eligible for Medicaid, then you may also need to provide this information to the state Medicaid or CHIP agency as proof of eligibility.