How soon should I get my birth certificate back after receiving passport?

I applied for a passport and put my birth certificate through along with it. I got my passport today, and they said the birth certificate would be sent separately. When should I get it back?|||The U.S. postal service does not apply to one person. It applied to millions of people.





When your mail has finished being processed, it will be shipped. BUt after 9/11 the mail takes a little longer to get to your destination for security reasons. In your particular case, I would assume it will take approximately 7-15 business days.