The trademark must be distinctive for the goods and services that you provide, not be deceptive, illegal or immoral and not be similar to existing trademarks. The validity term of a trademark in Nigeria is 7 years from the filing date and renewable for the successive periods of 14 years.Trademarks, Patents and Designs can now be filed online in Nigeria. Power of Attorney: Signed power of attorney is required in order for an agent to apply to register Nigerian trademark rights on your behalf. Chapter covers common issues in trade mark laws and regulations including legislation, application, refusal, opposition and registration. This article is a comprehensive guide into trademarks applications in Nigeria.