Las asevera libre de cargas

20:15 Jun 18, 2023 

@Neil. I can understand your frustration. The phrase is certainly very confusing because of the lack of subject. This is actually quite rare. Are you sure you have reproduced the phrase correctly?
At any rate, the mysterious subject missing here is, I am quite sure of that, "acciones", as you correctly inferred in your first post in this discussion area. Try to reconstruct your sentence by using "acciones" as the reference for "las" in "las asevera libre de cargas". The meaning is that the company guarantees that those shares are unencumbered ("la empresa/sociedad/compañía las [= las acciones] asevera [gosh, what a weird verb here!] libre de cargas").
Good luck!

18:14 Jun 18, 2023 

It's really just the lack of a subject at the start of the phrase that's putting me off. The client ordered the translation just before I went on holiday, so I recommended two trusted colleagues. However, the client decided to put it through an MT program which has spewed out a mangled heap of gibberish, which they thought it would be easier (and cheaper) for me to post edit. However, I'm having to translate these two horrible documents from scratch because they need them for tomorrow. Heigh-ho.

12:33 Jun 18, 2023 

You could translate "libre de cargas" as "free of impediments" so as not to have the "ENCUMBRANCES/unencumbered" strange-sounding repetition (if I read your post correctly). But you might (and I say might because I don't know the full legal ramifications of this), lose the legal significance of "unencumbered" there, so it might be better to leave it as you have suggested it ought to be translated. Further, if you translated it as "free of impediments," you'd then have to decide whether or not to say "free from impediments," which in my mind would cause a headache; I don't know about in yours.

09:37 Jun 18, 2023 

I now understand it refers to the company shares/assets being unencumbered.