Tiffany & Co. informed some customers in Canada that ‘an unauthorized third party’ accessed and obtained some client information on or around May 12.

Tiffany & Co. told some customers in Canada on Monday that a data breach four months ago may have leaked their names, postal and e-mail addresses, phone numbers and “sales data” in one of several attacks on luxury retailers in recent months.

In an e-mail seen by The Globe and Mail, the high-end jewellery brand owned by luxury conglomerate LVMH said that “an unauthorized third party” accessed and obtained some client information on or around May 12.

It did not provide further details on what type of sales data may have been accessed.

While the company did not state when the issue was identified, they learned about the type of data leaked f

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