Will the original applicant of the TREx be notified in case of an override?

In case of an override, a notification is sent out to the Trademark Agent and the Trademark Holder (if NORN to holders is activated). 

FAQ

API (Automated Interface)

billing

correction process

general

mark record verification

Notifications

official agents

proof of use

Registrars

Registries

Signed Mark Data (SMD)

Strawman Model - Abused Labels

Sunrise Services

support

trademark claims services

Trademark Eligibility Requirements

trademark submission

TREx Service

user registration