Sept 25 (Reuters) - Posera HDX Ltd HDX.TO :
* Chief executive officer steps down and announces expiry of letter of intent
to acquire premier payments systems inc
* Says an interim chief executive officer will be appointed as soon as possible
* Letter of intent to acquire premier payments systems inc has expired
* Announces loi to buy premier payments systems has expired and potential deal
will not proceed
* Source text for Eikon ID:nCNWWKGM0a
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