We search for anomalous ZZy and Zyy couplings with the L3 detector at LEP. The analysis is based on the study of the process e+e+→Zy at center-of-mass energies in the range 161 GeV <√s< 183 GeV. No evidence for anomalous effects is found. Limits at the 95% confidence level are set on the values of the eight possible anomalous couplings. Depending on the type of coupling new physics scales below 213 GeV to 1083 GeV are excluded.