Перевод - Сербский-Английский - Provericu u agenciji u ponedeljak da li je...

Hi again

Maybe you should put "at" instead of "in".
Maybe you should take out "it up" after "check" and maybe either replace "if this" with "whether" or add "to see3

The words "send" and "authorisation" have spelling mistakes.

A comma between "you" and "you" would make it easier to read and either a full stop or a comma after "authorisation".

The text would then read "I'll check at the agency to see if this..."

Bises
Tantine