Pro-marriage equality campaigns in Australia are popping up in the unlikeliest of places.

Take, for example, this Subway franchise in Melbourne that's been independently printing messages of support for marriage equality on its receipts, first spotted by Star Observer.

Chrys Stevenson, a customer visiting the Cranbourne Park Shopping Centre store, found a surprise at the end of her receipt, which she promptly posted on Twitter.

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The receipt reads:

Mashable Top Stories Stay connected with the hottest stories of the day and the latest entertainment news. Sign up for Mashable's Top Stories newsletter By clicking Sign Me Up, you confirm you are 16+ and agree to our Terms of Use and Privacy Policy. Thanks for signing up!

We believe in EQUALITY for ALL Australians.

What about you?

Vote "YES" in the Postal Survey.

Do it because it's the right thing to do.

Importantly, this isn't Subway's work, rather that of the franchise itself. Store owner Steve King confirmed to Mashablethe team had been printing these pro-marriage equality messages for weeks, following a fervent store campaign to encourage a 'Yes' vote in the Australian government's proposed postal survey on the matter.

SEE ALSO: People are outraged over this Australian anti-marriage equality ad

King and his team have been handing out pro-marriage equality badges and pamphlets to encourage Australian Electoral Commission enrolment over the past few weeks. The store has also been using their in-store television screens, usually relegated to new sandwiches and combo deals, to project versions of Australian Marriage Equality's 'Yes' campaign posters.

Credit: Steve King

Subway Australia has given Mashablea statement in regards to King's store, iterating their support for the personal beliefs of individual franchisees.

Each franchisee is a small business owner in their local community with their own personal views and beliefs. At Subway respect for every individual is a core value. We are committed to treating every person with honour, dignity and respect — regardless of their beliefs, race, creed, sexual orientation or gender.

Credit: Steve king

Australia's marriage equality debate is reaching a pivotal point, with the government's proposed plebiscite (a public vote on issues that don't affect the Australian constitution) under appeal in Australia's High Court. The court's decision whether or not to approve the government's controversial, non-binding, non-compulsory postal vote on the issue will be announced on Thursday, Sept.7.