Louisiana Notary Association -
This is the professional arm of all Notaries Public in Louisiana.  Not all notaries are members of the LNA, but the LNA is dedicated to the laws and welfare of notaries, most notably the education of those members to keep them up-to-date on the laws that are changing each year.  

The National NotaryAssociation  -
The NNA is a professional association that supports notaries in the United States.  They practice mostly Common Law Practices, while the LNA practices only Civil Law.