Neither is correct Example: I have informed the university that I intend to enrol in 2011. I have been informed by the university that they have accepted my enrolment for 2011.

I think it's have informed

i had been informed that i was misinformed. :P

这是要看语境的，have informed to 现在完成时，表示现在已经完成和对现在的影响 had informed to 是过去完成时 表示过去已经完成