To use Snapdocs, it isn't required to also be NNA certified. Snapdocs is not affiliated with the NNA.
If you are NNA certified though, just follow these instructions to easily show companies that use Snapdocs' technology that you're NNA certified.
Also, it's not necessary to obtain a background check through the NNA in order for the background check to be successfully verified by Snapdocs. Learn more about background check requirements here.