Is it a prerequisite to be the owner of the trademark in order to register in the Clearinghouse?

No, Trademark Agents are also admissible to submit a trademark record on behalf of the trademark owner. Trademark Agents are entities or individuals authorized to act on behalf of a Trademark Holder who has agreed to the Clearinghouse Terms and Conditions for Trademark Agents.

FAQ

API (Automated Interface)

billing

correction process

documentary evidence

general

invoicing

Mark Record Transfer

mark record verification

New gTLD program

Notifications

official agents

online payment

OT&E

prepayment account

pricing

proof of use

Registrars

Registries

Renewal

Signed Mark Data (SMD)

Strawman Model - Abused Labels

Sunrise Services

support

trademark claims services

Trademark Eligibility Requirements

trademark submission

TREx Service

user registration