- Aug 28, 2001
 
- 52,844
 
- 1,049
 
- 126
 
Only recently was I told that it was for outgoing mail.  It would certainly make trading netflix discs a lot more convenient if I could just leave it in there.  I don't think leaving outgoing mail with checks using the flag would be wise though - mail fraud and all that - telling thieves come take a look.  Do you use your red flag?  Do mail carriers think it's for the lazy?  
			
			
				
		
			