Mortgage loans: who chooses the notary, what fees are paid, and what points to review before signing - Infobae
Source:
https://www.infobae.com/economia/2025/03/06/creditos-hipotecarios-quien-elige-al-escribano-que-honorarios-se-pagan-y-cuales-son-los-puntos-a-revisar-antes-de-firmar/...
My brother in-law just told me about this online Notary Service, https://signnow.com/. It looks like it could be a viable option, instead of shelling out $$$ and time going to the US Embassy.