The majority of RBC clients are not U.S. persons and, in most cases, FATCA should have little impact. If you have an existing account and there is an indication that you may be a U.S. person, or if you are opening a new account, RBC may ask you to provide additional information or documentation to demonstrate that you are not a U.S. person. (link mine)
From the RBC’s FATCA page.
Hat tip: Suki