No, they are not excepting walk ins. Your appt. # on the confirmation email is your key in the door, be on time, as they are not allowing you in after or before that scheduled time.The process is quick unfortunately you will need reschedule yoir flight, seeing that your departure is 1155. After your documents are verified you will be ask to return at 2pm to pick up your passport. Well wishes on your journey, God bless!
Yes try and go that Monday right before 11:30 (it’s the last time before cut off) and explain to security that you have everything you need for verification. They will allow you in ... show them your email verification. They allowed me in after I told them I had an appointment in Miami for the following day but wanted to get my appointment faster and closer in Atlanta. The female security officer that is their was very generous in letting me in. I had to wait for the last call though at 11:30
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