What does this mean? "Document mailed to applicant"

gguai

Registered Users (C)
This morning I received an email from CRIS:

Current Status: Document mailed to applicant
What does this mean? RFE, Interview notice or approval
Case detail:

EB1-EA AD : May 23rd 2007
I-485: RD: June 7th 2007
 
This is an approval notice, usually for employment authorization documents or advanced paroles, but it could also mean your green card is approved. What receipt number is this message for (i.e. what kind of application)?
 
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