help needed

krishna (CA CS) (53 Points)

11 December 2007  
the institute asking me one confirmation letter regarding the dates change of articleship joiniong. my employer sent that 40 days back .now i made a call to institute,still they are saying we are not receiving that.
 i want submit the letter directly to the institute.now i m busy with mba exams and articles work. can i submit that after 20 to 25days.is it any problem?