Eliminate the word "the" from Attorney.
Substitute "was" for got and "to" for in.
Either place a comma after year of capitalize Having
My offer:
In the City of Asuncion, Republic of Paraguay, on the 4th day of MAY of 2009, Attorney NAME, General Secretary of the Universidad Americana (American University) Certifies that:
Mister
NAME, I.D.
NUMBER and RUA (Student Record Number)
NUMBER was admitted
to this academic institution in the year
YEAR , having
successfully completed the
required course of study in the field of
COMPUTER SCIENCE ENGINEERING and as recorded in our files, his grades are as expressed below: