Domtar Co-Sponsors the Rainforest Alliance’s 25th Anniversary Gala

Milestone Celebration Highlights Environmental Accomplishments, Push for
Sustainability

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(NYSE: UFS) (TSX: UFS)

MONTREAL, May 15, 2012 /PRNewswire/ – To help celebrate 25 years of the
Rainforest Alliance’s achievements, Domtar Corporation (NYSE: UFS)
(TSX: UFS) today announced it will co-sponsor the sustainability
organization’s 25(th) anniversary gala on May 16 in New York City.

The annual dinner and award ceremony will commemorate some of the
Rainforest Alliance’s biggest triumphs since pioneering the concept of
responsible forestry certification. Those include:

        --  Conserving more than 170 million acres of forest and farmlands
            in over 100 countries;
        --  Improving the lives of more than 9.5 million people worldwide,
            including farmers, forest managers, workers and their families;
        --  Engaging with more than 490,000 agriculture, forestry and
            tourism operations; and
        --  Introducing countless consumers to Rainforest Alliance
            Certified(TM) products. That includes extensive work with
            Domtar, whose papers have set the industry standard for
            displaying the Forest Stewardship Council(TM) (FSC®) label
            and the Rainforest Alliance Certified seal.

Domtar has worked with the Rainforest Alliance to ensure that 28 of the
company’s pulp and paper mills and converting and distribution
facilities now meet FSC standards. Nearly 20 percent of Domtar’s paper
products have been FSC-certified while, across America, the FSC
estimates that only 4 to 6 percent of paper products earn that
distinction.

“After all our hard work over the past 25 years, it’s important for us
to recognize companies for their demonstrated commitments to
sustainability, and that list includes Domtar” said Tensie Whelan,
president of the Rainforest Alliance. “We’ve worked with Domtar for
more than a decade, and we’re proud of how they have raised the bar for
the paper industry and set an example for encouraging environmental
responsibility.”

Proceeds from the gala will benefit the Rainforest Alliance’s
comprehensive sustainability initiatives, which help ensure sustainable
livelihoods and conserve biodiversity. This marks the seventh year
Domtar has sponsored the gala, one of the ways Domtar has teamed up
with the Rainforest Alliance to encourage responsible paper production
and fiber sourcing.

“We’re proud to be at the forefront of the responsible production and
use of forest products, and we’re excited for both the gala, as well as
a workshop beforehand that will bring together leaders in sustainable
business,” said Lewis Fix, Domtar Vice-President of Sustainable
Business and Brand Management. “We’re looking forward to saluting some
of this year’s remarkable achievements, and we also salute the
Rainforest Alliance for 25 years of accomplishments.”

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About Domtar

Domtar Corporation (NYSE: UFS) (TSX: UFS) designs, manufactures, markets
and distributes a wide variety of fiber-based products including
communication papers, specialty and packaging papers and adult
incontinence products. The foundation of its business is a network of
world class wood fiber converting assets that produce papergrade, fluff
and specialty pulps. The majority of its pulp production is consumed
internally to manufacture paper and consumer products. Domtar is the
largest integrated marketer of uncoated freesheet paper in North
America with recognized brands such as Cougar®, Lynx(® )Opaque Ultra, Husky(®) Opaque Offset, First Choice® and Domtar EarthChoice(®). Domtar is also a leading marketer and producer of a complete line of
incontinence care products marketed primarily under the Attends(®) brand name. Domtar owns and operates Ariva(TM), an extensive network of strategically located paper and printing
supplies distribution facilities. In 2011, Domtar had sales of US$5.6
billion from nearly 50 countries. The Company employs approximately
9,100 people. To learn more, visit www.domtar.com.

SOURCE DOMTAR CORPORATION