AP 批準兩周, 還沒收到郵件. 正常嗎? -- 謝謝大家.

各位大俠,

兩周前收到移民局e-mail通知:

Receipt Number: SRCxxxxxxxxxx
Application Type: I131 , APPLICATION FOR USCIS TRAVEL DOCUMENT
Current Status: Approval notice sent.
On May 10, 2007, we mailed you a notice that we have approved this I131
APPLICATION FOR USCIS TRAVEL DOCUMENT. Please follow any instructions
on the notice. If you move before you receive the notice, call customer
service ......

但現在還沒收到移民局的郵件, 請問這正常嗎? 諸位有過類似經曆嗎?

多謝指教!