Completion requirement for the document. Accepted values can be notarization, esign, identity_confirmation (identity confirmation feature), readonly,
and non_essential. Completion requirement for the document. If the value is set to non_essential, the document will be hidden from signers before the notary meeting and values for
customer_can_annotate and witness_required will be ignored and set to false. identity_confirmation is used to support signing of PS Form 1583 for signers without a US SSN.
Note: if identity_confirmation is set as the document requirement, ensure that all requiring notarization in the transaction also use identity confirmation as the requirement to avoid
requiring KBA on the transaction. Read more about document requirements.