Push Notification in ACS

Hi,

If we have multiple brands on ACS and multiple mobile channels(apps) configured for those brands.

Suppose: BRAND A and BRAND B

Now is it possible to send push notification to BRAND A (mobile channel selected as BRAND A while creating push template) from the registration token logged to BRAND B??

We did a testing by sending the notification to tokens generated for different brand and it got successfully delivered. 

How is it possible if the token is generated from a different app?