The term Pending to Expire means that the status of the Direct Debit has been updated under certain circumstances, and a cancellation AUDDIS (0C) has been created, ready to send to the payer's bank.
These circumstances are:
When a contract ends through a Give Notice (terminate contract) Patch.
When a contract with an expiration date comes to an end.
When a contract is manually archived.
Once the 0C is released into the submission file, the Direct Debit status updates to Expired.
If a contract was initially cancelled via a BACS message, and is subsequently cancelled and archived, the status stays on Pending to Expire as no 0C needs to be sent.
📌Note: this status is only available if your account is configured with 0C functionality i.e. to create cancellation AUDDIS.