My title in my company has changed but there has been no announcement

My company is very bad about broadcasting HR changes, both good and bad. Should I care? This isn't about me, its about the structure of my team and the company. I was told my title would be changing in recognition to extra work my team is doing and so there's more understanding in the org that we are responsible for certain activities. However if no formal announcement is made then it might as well have never happened. Should I say something?