The England and Saints hooker was cited for allegedly striking opposite number Rory Best with his arm during Northampton's Heineken Cup pool defeat against Ulster last Friday night.
European Rugby Cup has announced that Wales' Roger Morris has been appointed as independent judicial officer to hear the complaint against Hartley.
He could face a ban of anything between two weeks for a low end entry point, to a maximum 52-week suspension.
Cardiff Blues' Wales international scrum-half Lloyd Williams has also been summoned to Dublin on Thursday after he was sent off for an alleged dangerous tackle against Montpellier two days ago.
And Newport Gwent Dragons flanker Jevon Groves faces a Thursday hearing as well following his red card for an alleged dangerous tackle during the Dragons' Amlin Challenge Cup victory over Italian side Mogliano last weekend.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The Barbarians are one of the top invitational rugby sides with a long history and classic rugby jersey.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
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Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
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The Lions are ready to get their Australia tour underway. They arrive in Perth on Monday.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.
