These two documents are frequently confused because banks and landlords sometimes ask for "your incorporation documents" when they mean one, the other, or both.
Articles of Incorporation / Organization
Filed once, when the business is formed. Lists the entity name, registered agent, and basic structural details. It never changes unless you file an amendment. It proves the entity was created — but says nothing about whether it is still in good standing today.
Certificate of Good Standing
Issued on demand, dated as of the day you request it. Confirms the entity is properly registered and current on its filings and taxes as of that date. This is the document that proves the entity is alive and compliant right now.
When you need each
A lender or landlord opening a file usually wants both: a certified copy of the Articles (proving formation) and a recent Certificate of Good Standing (proving current status). For foreign qualification, the receiving state wants the Certificate of Good Standing from your home state, and sometimes a certified copy of the Articles as well.