Create a workflow which is described on following image. Note: After any two of three approvers finish their approval tasks document will be either approved or rejected. Resolution Access SharePoint site and create custom SharePoint list. List name: Regulation Approvers Columns: Editor (PeoplePicker) Approver1 (PeoplePicker) Approver2 (PeoplePicker) Approver3  (PeoplePicker) Note: Using this method ...