What to write on N-400 application envelope

[McImmigrant]

I am submitting my son's N-400 application, hopefully today. I still have 1 minor issue that I need clarified..

I plan to send the application by usps mail - probably priority with return receipt. The mailing address for Georgia is:

Texas Service Center
PO Box 851204
Mesquite, TX 75185-1204

But should I add my son's A# to the usps envelope as well. So I would write...

Texas Service Center
Att: N-400 A# 123 456 789
PO Box 851204
Mesquite, TX 75185-1204

Is this correct or should I leave out this info. Or should the A# line be included in the from section, under my son's name?

I have not used any internal envelope. I simply attached the N-400 application + supporting docs with a paper clip and have placed it inside the priority flat rate envelope.

 

[Bobsmyth]

No need to add A# to address. Just the address alone is fine.
Your son's A# is in the application itself.
The priority envelope is fine since only USCIS will open it in their mailroom. No need to complicate things.