You can change the Collection Status assigned to the customer accounts currently displayed in the Collections Search Results form. To bulk update the collection status:
Right-click anywhere in the Collections Search Results window and select Bulk Operations > Bulk Update Collection Status. This displays the Bulk Update Collection Status window.

Select the collection status you want to assign from the drop-down list.
Click Save to assign the selected status to the customer accounts currently displayed in the Collections Search Results form. This displays a Bulk Operation Status window indicating the bulk operation completed successfully.
Click OK. This updates the Collection Status column in the Collections Search Results form with the new status.