Validity of trademark :
The validity of a trademark is judged primarily by its ability to identify for consumers the source of a good or service and distinguish it from other brands. However, there are some instances where a mark serves this function perfectly well, but is still invalid as a trademark. This occurs when the mark itself is forbidden.
Verification :
An affidavit required on many submissions to the U.S. Patent and Trademark Office in which the affiant declares the truth and accuracy of statements made therein.
