Te Wehi signed the Cook Strait (Henry Williams) sheet of the Treaty of Waitangi on 16 May 1840 at Waikanae. He may have been from the Te Āti Awa iwi (tribe). Henry Williams, the missionary who witnessed his signature, recorded that he was one of the main rangatira (chiefs) to sign the treaty.
In 1847 he signed the Colonel McCleverty Deed for the Te Aro Block in Wellington. In 1854, Te Wehi Kore signed the sale document for the Te Awaiti and Part of Pahaua Block in Wairarapa.