A document sent to prospective clients of West Ham United claims that fans who encroach onto the pitch following the final home game of the season could face lifetime bans.

A letter, which KUMB.com has seen and has been issued to a number of parties interested in staging events at the Boleyn Ground before it is handed over to developers next summer, claims that supporters will be liable to prosecution under the Football Offence Act 1991 should they enter the field of play when West Ham face Swansea in their last ever home game next May.Sent by Commercial Director Felicity Barnard, the letter confirms that summer pitch events will be staged at the Boleyn Ground between 14th-30th May 2016 - and that the club will do "everything possible to ensure the pitch is in the best possible condition following the celebrations to mark our departure from Upton Park".In the weeks leading up to the Swansea game, which is currently scheduled for Saturday 7 May, West Ham will "proactively warn" supporters not to access the pitch following the final whistle - a policy they intend to enforce by deploying "increased stewards" at the game to ensure that "the occasion is not spoilt by over exuberance".And fans will be reminded that "entering the field of play is a criminal act" - with any ignoring the order liable to prosecution under the 1991 act and likely to be banned "from all football stadia" - including the club's new Olympic Stadium home.The club add that summer events will be treated as "a priority" and that the aforementioned measures are necessary to ensure that all such commercial arrangements "are protected".West Ham United have called the Boleyn Ground home since 1904. The ground, which the club currently owns has been sold to Galliard Homes and will be replaced by a housing development. West Ham's 99-year tenancy of the Olympic Stadium commences next summer.* What do you think of the club's decision to order supporters to stay off the pitch after our last ever game at the Boleyn? Have your say on the KUMB Forum or in the comments section below.