It has long been rumoured that Bachelor couples must sign a 'love contract': a legal agreement to stay together for a fixed period of time after the show.

And after multiple contestants denied the existence of this 'deal' with producers, former suitor Nick Cummins revealed on Wednesday that it does actually exist.

Speaking on ABC Radio National, the 31-year-old rugby star said the main reason he didn't choose either of his finalists was because his contract required him to stay in a relationship with the winner for at least three months.

'Three months down the track, we're allowed to break up': Nick Cummins has confirmed there is a 'secret Bachelor love contract' - as he defends his decision to dump both finalists. Pictured with Sophie Tieman (left) and Brittany Hockley (right)

'People are so brainwashed, you're not going to get your fairytale ending every time,' Nick said.

'And what's more important: me just saying "yes" and going through the motions and dragging some girl through all this media about how we're in love and then three months down the track after the contract's over we're allowed to break up?'

He continued: 'That's happened [in the past]. I wasn't going to do that because I have respect for the girl.'

It's confirmed! Speaking on ABC Radio National on Wednesday, the 31-year-old rugby star said the main reason he didn't choose either of his finalists was because his contract required him to stay in a relationship with the winner for at least three months

Daily Mail Australia has contacted Channel 10 for comment.

During the finale, which aired in October, Nick sparked a backlash when he dumped both finalists - Brittany Hockley and Sophie Tieman - and chose to stay single.

The former Wallaby actually made similar comments in October, during an appearance on Channel 10's The Project.

'It's not fair to her. Going down that path three months, only to break her heart,' he said, referencing the same time period.

'She'd be sitting here now. People would be asking if you're in love. And it's like, I didn't want to lie.'

Obligations: It comes after this year's Bachelorette, Ali Oetjen - whose own relationship with winner Taite Radley has faced scrutiny - revealed details about her own contract

It comes after this year's Bachelorette, Ali Oetjen - whose own relationship with winner Taite Radley has faced scrutiny - revealed details about her own contract.

When asked by E! News whether there's an obligation to pick a winner at the end of the show, she replied: 'There's definitely not. It's all in my control.

'If I didn't have feelings for them, or if I didn't fall in love, I wouldn't pick someone for the sake of it.'

It has long been rumoured that Bachelor couples must sign a 'love contract': a legal agreement to stay together for a fixed period of time after the show. Pictured: Matty Johnson and Laura Byrne - who are still together long after their contracts expired - in the Bachelor 2017 finale

On Wednesday, body language expert Louise Mahler told New Idea that footage of Ali and Taite arriving at Adelaide Airport on Thursday could be proof they 'have a deal' and are just 'keeping up appearances'.

'Overall this behaviour says, "This is a couple that know each other, have a deal, and know they are being watched",' Louise claimed

'They do not necessarily look at each other mutually and when they do meet eyes there is no spontaneous reaction - no smile.'