Alberta NUNAS report is required to register or change the name of an Alberta or out-of-province corporation.
You need to get an Alberta NUANS report and review it to make sure there is no other corporation with an identical name or a name that is too similar to your proposed corporation name. Unlike business names, identically named corporations are not allowed. The NUANS report reserves the proposed name for 90 days.
You do not need a NUANS report when the proposed name will be a ‘number name’ assigned by Corporate Registry (for example, 9999999 Alberta Ltd.).
Read more https://www.alberta.ca/incorporate-alberta-corporation