I disputed 3 collection reports with Transunion and they took care of the matter within 30 days. The letter from Transunion informed me that they would informed the other 3 Credit Bureau. Now, I am suppose to receive a report from the other two credit bureau?

Maybe you will receive notification from Equfax and Experian of that item being corrected, but I wouldn't count on it. My advice is to disput any errors with every bureau that has reported them. You might even have to dispute it more than once.

Thank you!!