Why you get this letter
When you apply, the Marketplace compares what you entered with its records. If something doesn’t match, such as your income, your citizenship or immigration status, or whether you have other coverage, it asks for documents to confirm it. HealthCare.gov calls this a “data matching issue” or “inconsistency.”
The letter, or your eligibility notice, says exactly what information is missing and your deadline. That date is the one that counts.
How much time you have
According to HealthCare.gov:
- 90 days to confirm information that doesn’t match, such as household income.
- 95 days to confirm citizenship or immigration status.
- 30 days to confirm you qualify for a Special Enrollment Period due to loss of coverage.
Don’t wait until the last day. And if you missed the deadline, HealthCare.gov recommends sending the documents anyway.
Which documents to send
Your letter includes the list of accepted documents for your case. For income, HealthCare.gov says:
- If your income won’t change: your most recent tax return or your W-2s.
- If your income will change: recent pay stubs or a document stating your new wages or when contract work ends.
- If your income is hard to predict, for example if you are self-employed: a self-employment ledger or a letter of explanation.
- If you don’t have current-year documents: you can upload an annual income letter of explanation with your total for the year.
- For citizenship, immigration status or other coverage: the documents listed in your letter.
How to send them
According to HealthCare.gov, uploading them in your account is the fastest way. PDF, JPG, PNG and other common file types under 10 MB are accepted, with file names that have no special characters.
You can also mail them, photocopies only, with the bar code page from your letter or your name and application ID. The Marketplace doesn’t accept documents by email or fax.
If you have questions, call the Marketplace Call Center at 1-800-318-2596 and explain that you received a notice asking for documents.
What happens if you don’t send them
According to HealthCare.gov, the Marketplace rechecks your eligibility using the information it already has, not what you entered. If the issue is income, you may get less help or lose it; if it is citizenship or immigration status, you may lose Marketplace coverage.
The Marketplace won’t end your eligibility or change your help without notifying you first: it sends warning notices and makes a reminder call.
If you lose your help or coverage, review your options as soon as possible: there may be a private health plan you can buy any month. If it is a limited-benefit plan, it does not replace Obamacare coverage, may exclude pre-existing conditions and does not help you avoid state penalties (California, Massachusetts, New Jersey, Rhode Island and D.C.).
Private health plans if you don’t qualifyFrequently asked questions
How many days do I have to send documents to the Marketplace?+
According to HealthCare.gov, generally 90 days for information such as income and 95 days for citizenship or immigration status. The exact date is in your letter.
What is a “data matching issue”?+
It is when information on your application doesn’t match records, for example your income or your status. The Marketplace asks for documents to confirm it.
Can I send the documents by email?+
No. According to HealthCare.gov, the Marketplace doesn’t accept documents by email or fax. Upload them in your account or mail them, photocopies only.
Will I lose my insurance if I don’t send the documents?+
You may lose your help or your coverage, depending on the missing information. Before making changes, the Marketplace sends notices and calls you.
What should I do if I missed the deadline?+
HealthCare.gov recommends sending the documents even if the deadline has passed, because you might re-qualify for savings or coverage. You can also call 1-800-318-2596.
Sources
- HealthCare.gov · Confirm the information on your application
- HealthCare.gov · When the Marketplace needs more information
- HealthCare.gov · Required documents and deadlines
Facts verified on November 10, 2026. Rules change: if you read this later, confirm with a benefits consultant.
Educational content; not legal, tax or immigration advice. Latin Prime Financial Group is a private insurance agency, not affiliated with the government, HealthCare.gov or CMS. The exact deadlines and documents are the ones in your letter; some states with their own marketplace have different rules.