Are you saying that you already have a power of attorney but you only need it authenticated by the embassy? If so it sounds more like something a lawyer would be to do for you rather than the embassy itself. However if you want to ask, to have the embassy do it for you, you should go to your local embassy in person to do this.
You have to insist
This transaction requires the document to be sent to the consulate by going there or calling them ifbyou can mail it - for it to be authenticated or add a red ribbon on it.
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