[UPDATE: Hell Pizza has now emailed customers to inform them of the situation, and to suggest they change their login if they use the same password for other websites; see copy in the Comments section below. - CK]

He knows what you ate last summer.

A hacker's claim to have stolen a large slice of Hell Pizza's customer database appears to be correct - at least in part.

ASX-listed Domino's has acquired Belgian pizza chain Pizza Company, a deal said to propel the company to that country’s top pizza delivery business.

Separately, New Zealand-owned Hell Pizza has opened its first Canadian outlet.

The Domino's acquisition involves 15 stores in Belgium and doubles Domino's existing outlets. The amount was not disclosed.

Domino's Pizza chief executive Don Meij said the purchase would give Domino's the biggest pizza store count in Belgium.

The founders of the Hell pizza chain have bought back the business they sold less than three years ago.

Warren Powell, Stu McMullin and Callum Davies take the helm again on Friday, and plan to shift the Hell brand back to its quirky roots.

The trio sold Hell to TPF, owners of Burger King, for $15 million in December 2006.

They retained the international rights to the brand and have opened outlets in Australia, England and Ireland, with Canada next on the list.

Hell Pizza is looking to increase its prices in the midst of a recession, but is confident the change won’t drive customers elsewhere.

It is understood the cost of a double size pizza will increase $1 and the standard size will increase 50c.

This will put the price of Hell’s most expensive pizzas at $17.

According to a memo sent to franchisees today from Hell Pizza’s general manager Colin Mellor, customers won’t mind paying extra for pizzas in a recession.