Yes, trademark renewal services in Singapore are legitimate. Trademark owners can renew their trademarks through the Intellectual Property Office of Singapore (IPOS) or authorized trademark agents. It’s important to ensure that you engage with reputable agents like Offshore Company Corp; One IBC; Singapore Company Formation, etc, or the official channels to renew your trademark to avoid any potential issues. In Singapore, there exists a grace period of one year following the expiration date. If you choose to renew the trademark within the initial six months of this grace period, an extra fee of S$180 per class for the belated renewal will be applicable.