Minn. Stat. § 284.18: REGISTERED LANDS; RECORDING WITH REGISTRAR.

In case any of the lands involved in the action are registered, a copy of the summons, embracing a description of the registered lands but omitting the unregistered lands, shall be recorded with the registrar of titles, and such further notice shall be given as the court may direct before the issuance of any new certificate of title shall be ordered; provided, that failure to record such copy of the summons or to give such other notice shall not otherwise affect the validity of the proceedings.