@wckjc 
Thank You for sharing your direct experience with this business entity.
As I indicated above, No first-hand knowledge on that platform (snapdocs ) as their Fees are abysmally LOW . . .
That’s a LOT of Signing Orders [SOs] to remain UNPAID.
You may also benefit by Reviewing the following two detailed posts:
STEP-BY-STEP INVOICE COLLECTION GUIDELINE
