
In a trademark opposition or trademark cancellation, both parties can make certain types of materials part of the evidentiary record by filing them under a notice of reliance. Each party must file their notices of reliance and associated materials with the Trademark Trial and Appeal Board (TTAB) and serve them on the opposing party during its 30-day trial period. Neither party is required to file a notice of reliance during its trial period, but because it is a fairly easy and inexpensive way to submit certain evidence in support of their cases, the parties frequently utilize this procedure rather than more cumbersome methods (such as through witness verification during a testimony deposition).



