[ESMA 70-1861941480-56 MiFIR data reporting Q&A, Q&A 5.4]

When field 12 (termination date) of Table 3 of the Annex to RTS 23 and related MAR RTS and ITS is initially left empty, the reporting entity is expected to fill it in when the instrument is going to be terminated. This also includes the cases when the given instrument has matured/expired, i.e. where fields 15 (maturity date) or 24 (expiry date) are applicable to the given instrument and are populated in the report.

The termination date should be earlier than or equal to the maturity/expiry date in the cases where the maturity/expiry date is populated.