Link for your reference: https://support.docusign.com/s/articles/000045001?language=en_US&rsc_301
Very Important Note: DocuSign users buy "envelopes" from DocuSign, When they run out, they can not send any more.
1) for US TITLE: you should CC Adella Pearson (email: adellap@ustitleutah.com) to confirm if they have reached their envelope limits