The United Nations (U.N.) says North Korea never officially notified the world body of its plan to launch a satellite into orbit.

U.N. spokeswoman Michele Montas told reporters Thursday that the U.N. Office for Outer Space Affairs never received any notice from the North under the Outer Space Treaty or the 1976 U.N. Convention on Registration of Objects Launched into Outer Space with regard to its launch.

The U.N.’s statement contradicts comments by North Korea’s deputy ambassador to the U.N. Pak Tok-hun who said he believed his country had indeed registered what it says was a satellite it launched into space last Sunday under the registration convention.

Last month, North Korea signed the registration convention, which requires a country to give prior notice to the U.N. of any plans to launch an object into space.

The statement from the Office of Outer Space Affairs came shortly after International Telecommunication Union spokesman Sanjay Acharya said his agency has not picked up any transmissions from the satellite the North claims to have sent into orbit nor was it not notified of the North’s launch plans.