Recently-proposed regulations will require information reporting for single member L.L.C.’s that are owned by non-U.S. persons and treated as disregarded entities. Typically, this structure is used for the acquisition of an apartment by camera-shy, high net worth individuals and offshore trading companies wishing to appear as U.S. persons. The regulations are designed to supply the I.R.S. with information about the operations and ownership so that information may be exchanged with tax treaty partner jurisdictions. Philip R. Hirschfeld and Nina Krauthamer examine the proposed reporting rules.