Nov 26 (Reuters) - U.S. LNG producer Venture Global ( VG )

accused Shell of waging a "three-year campaign"

to damage its business after Shell appealed an arbitration loss,

according to a staff note confirmed by Reuters on Wednesday.

Venture Global ( VG ) has faced arbitration claims from Shell, BP

and other European buyers alleging contract breaches after the

company sold LNG on the spot market during the 2022 energy

crisis.

The email from Venture Global's ( VG ) co-founders, Michael Sabel

and Robert Pender, criticized as "misguided" a decision by Shell

to challenge the unanimous ruling and added that Venture Global ( VG )

would continue to defend itself.

Venture Global ( VG ) and Shell did not immediately respond to a

Reuters request for comment.

The decision should be a concern to Shell's board of

directors and its shareholders, the Venture Global ( VG ) co-founders

added in their email.

"To be very clear, this action relies on completely baseless

claims and is an unfortunate continuation of their three-year

campaign to damage Venture Global ( VG )," the company told employees.

First reported by the Financial Times, the note was

confirmed to Reuters by a company source who spoke on condition

of anonymity.

It also highlighted recent supply deals worth $28 billion

with customers in Greece, Japan and Spain, saying the company

was on track to become the world's largest LNG producer.

Shell launched a challenge in New York state court this

month to overturn the arbitration ruling.

Separately, Shell was ordered to pay Venture's legal fees

following a recent loss in arbitration LNG supply claims.

Both cases centered on Venture Global's ( VG ) failure to deliver

LNG under long-term contracts while selling cargoes on the spot

market as prices surged after Russia's 2022 invasion of Ukraine.

In August, Venture Global ( VG ) won a case against Shell at the

International Chamber of Commerce but lost another against BP

in October, which is seeking damages of more than $1

billion.