Over the past 30 years we have authenticated many documents from Alberta the most common ones are what are called vital statistics documents like a Birth Certificate, Marriage Certificate or Death Certificate. In most cases the original is the preferred one to authenticate but in some cases you maybe able to use a notarized copy, it is best to check with your in-country contact to confirm what is best for your situation.
If you need a new original Alberta Birth Certificate, Marriage Certificate, Death Certificate for authentication legalization its easy to order online following the links:
Alberta Birth Certificate for Authentication Legalization
Alberta Marriage Certificate for Authentication Legalization