You receive "borrower completed a loan application" notifications for files that closed weeks ago, for loans that were only ever pre-quals, or for a file where no borrower has been invited yet. Several often arrive at once, to you and sometimes to colleagues.
Check the timestamp first
Compare the time on the message with the actual activity on the loan it names. If the loan has had no borrower activity, the notification is a replay of an older event rather than a record of something that just happened. Nothing in the loan data has changed and no new application has been submitted.
What causes it
A platform release can re-fire completion notifications against applications already in the system. It presents as a burst of messages across a lender's loan officers within the same hour, all referencing files they recognise as already handled.
Borrowers do not receive these
The re-fire reaches internal notification recipients only. Borrower-facing emails and texts are driven separately by the borrower task notification setting on the loan, which you can check yourself from the settings area of the Loan Summary page.
Recipients who should not be on the list
If colleagues who are no longer in your admin portal configuration also receive them, review the CC list on that loan officer's page in the admin portal. Stale entries there receive anything the page sends, independently of this.
What support will ask for
The subject line, the timestamp as the message arrived, and one or two of the loans referenced. A complete list of affected loans is generally not available after the fact, so report the ones you can see.