"Malta" looks like a further emboldened Optima (Black) (with modified/flattened ends?)

I can't find anything close to "CERVUNION".

"BANCO COMERCIAL ANTIOQUENO" logo can be found in AI vector format here:
http://descargas.merca-web.com/descargar-b.php

The font used must be an artificially slanted Gill Sans (Light)
(the actual Gill Sans Light Italic is way different from your sample)

"Bancoquia" looks like Verdana (Bold Italic) further emboldened and a bit manually compressed.

I had seen the link, but if you look closely the letter 'a' of the word 'Bancoquia' is not the same. I just got an image of more resolution, look.
Here also you can see well 'BANCO COMERCIAL ANTIOQUEÑO'. sorry for my bad English.

Bancoquia appears to be Eras Bold, and Banco Comercial Antioqueno appears to be Eras Book Italic:

http://www.myfonts.com/fonts/itc/eras/std-bold/