You can change, make the appointment online and search of the 6 points verification, that's the papers that you need to show on the appointment.
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Keep in mind, every "I" has to be dotted & every "t" crossed on every form or else they reject everything. No mistakes. No cross outs, and every form must match the other. Go slow when you write, and make sure you have everything. Be nice and cordial and don't give them a hard time or else they will resist you. If you start to get frustrated, tell them "I need help," and "I know you can help me."
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