Your documents may still be in transit
The Department of State returns supporting documents—such as a previous passport, birth certificate, or naturalization certificate—by First Class Mail. It says they may arrive up to four weeks after the new passport book or card.
When to report the missing documents
If more than four weeks have passed, call the National Passport Information Center using the number on the current official page. Explain which document is missing and keep the passport application details and delivery information available. Outside the United States, contact the U.S. embassy or consulate that handled the application.
This is different from a missing new passport
Form DS-86 is for a new passport that the Department of State issued and mailed but you did not receive. It is not the reporting form for supporting evidence that arrives separately.
Ask promptly about reimbursement
The Department of State publishes a limited window for requesting reimbursement for a supporting document it lost and requires proof of replacement cost. Because its passport pages do not currently state that window consistently, contact Passport Services promptly and follow the deadline it gives for your application rather than relying on an older copied period.
What to keep
Save the new passport envelope, application receipt, status notices, tracking information, notes from the call, and any receipt for replacing a missing document. Do not send personal document numbers to WhatDoIFile.