Legislation to recognise relationships — whether they be same-sex or de facto — will be introduced into SA Parliament today in the wake of a case in which a British man struggled to have his marriage recognised on his husband's death certificate.

Key points: Relationships register will allow same-sex couples to legally record their relationship

Relationships register will allow same-sex couples to legally record their relationship Marco Bulmer-Rizzi, whose husband died overseas, will be in Parliament as bill introduced

Marco Bulmer-Rizzi, whose husband died overseas, will be in Parliament as bill introduced Bill is one of a number of measures the SA Government has undertaken to remove discrimination against LGBTIQ people

In January this year, Marco Bulmer-Rizzi was honeymooning in Adelaide with his new husband David, when David was killed in a freak accident.

Because their marriage in the United Kingdom was not recognised in Australia, Mr Bulmer-Rizzi's death certificate was stamped "never married".

Marco Bulmer-Rizzi was not considered next of kin.

"It was a personal attack on David, our memories," Mr Bulmer-Rizzi said in January.

"It was the most humiliating moment of my life."

Premier Jay Weatherill apologised at the time and stepped in to have the death certificate amended.

The State Government will now introduce legislation that will allow for a relationships register, where same-sex couples can legally record their relationship.

Assistant Minister to the Premier, Katrine Hildyard, said the State Government was not going to wait for Federal Parliament to legalise same-sex marriage.

"Whilst we're waiting for marriage equality, whilst we're campaigning for it, steps taken to have things like relationships registers in place will mean that couples — same-sex couples and other couples — will be able to be afforded some rights," she said.

Ms Hildyard said it will mean a lot to her to have Marco Bulmer-Rizzi in Parliament when she introduces the bill today.

"It means an incredible lot to have him there," she said.

"I really look forward to having him there.

"I think his tragic story actually really brings to life why we need this bill in place."

The Relationship Register Bill is one of a number of measures the State Government has undertaken to try to remove discrimination against LGBTIQ people in South Australian laws.