Thanks for your question.
I'm not sure what you mean in your most recent post, I believe you refer to their requiring a witness and a further appointment.
Obviously you should make the appointment, but basically they are going to require that you prove you are who you say you are. This is probably going to mean that you will have to order a copy of your birth certificate from Portugal, executed a declaration of what has happened, who you are and that you require a passport or travel document in order to travel to Potrugal. It may be that they also require one of your close relatives to execute a witness statement in support.
They will be able to check the administrative records held about you in Portugal.
If they are not willing to issue a passport then you will probably receive a travel document limited to a set period of time within which you can travel to Portugal for your purpose and to also sort out a replacement passport there.
It's a bit of a hassle but provided you are who you say you are you will receive a travel document in order to travel to Portugal, but the key is the Portugese embassy so you've got to stay in touch with them and comply with their requirements.
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