Hello, good morning, if you are attended without an appointment but you have to bring some kind of document that confirms that you need to renew your passport, I went to the Washington consulate on Monday, July 12, 2021 and ufffff it was super difficult, until my lawyer sent those documents I was served otherwise only with appointments
Try the first days of each month if you can't go to. The embassy will attend you without an appointment but try as I say and if you can, try to contact them on facebook they answer you
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