ESSENDON is investigating a second allegation of racist behaviour at the MCG during Saturday's Dreamtime at the 'G match.

An Essendon member contacted the club on Saturday night alleging that another member repeatedly booed former Sydney Swans champion Adam Goodes when he appeared on the MCG screen in an advertisement for the Recognise campaign on indigenous recognition in the Australian constitution.

In an emailed response, Essendon said the complaint had been passed onto management to be dealt with.

However, the club said it might be difficult to track down the person involved because of uncertainty about which seat he held. 

That person is understood to have changed seats a number of times during the course of the match.

"The club does not condone this behaviour at our games from anyone and as you may have seen this is not the only incident from the weekend in which the club has dealt with," the Essendon email said.

In the first incident that came to light, a complaint was posted to social media following the game saying a woman wearing a Bombers scarf targeted indigenous Essendon players during their loss to the Tigers.

Bombers chief executive Xavier Campbell said the club was taking the issue seriously.

"We are investigating the alleged incident and if required will take the appropriate course of action in accordance with our Members' Code of Conduct'," he said in a statement on the club's website.

"Essendon Football Club will not, and does not, tolerate anti-social behaviour of any type whether it's at the football ground or in the community."

Campbell said the Bombers hoped their members and supporters in general reported any racial incidents in the stands.

"I would also encourage people who witness anti-social behavior at games to report the matter to stadium security via the text lines," he said.

"Our vision is to be the most inclusive, successful and respected sporting organisation in Australia, and we believe everyone has the right to feel sale and welcome at the football."

Last Saturday's meeting with Richmond was the 12th time the clubs have met for the Dreamtime at the 'G game, with the Tigers and Bombers committed to hosting the marquee game in Indigenous Round for another decade.