(16)Where only one of the counterparties is a systematic internaliser in a given financial instrument and it is also the buying firm for that instrument, it should be responsible for making the transaction public as its clients would expect it to do so and it is better placed to fill in the reporting field mentioning its status of systematic internaliser. To ensure that a transaction is only published once, the systematic internaliser should inform the other party that it is making the transaction public.