Northampton Town have told Rushden & Diamonds supporters they can exchange their Diamonds season ticket for one at Sixfields, at no extra cost.
Diamonds were expelled from the Football Conference at the weekend, but are considering a legal appeal.
The Cobblers have swooped in though, offering League Two football to disillusioned Rushden fans.
"We understand some supporters may take this offer, some may not," said Cobblers chairman David Cardoza.
"But it is a genuine offer to those supporters who will have a void in their weekends this coming season to allow them to come and watch League football at their own prices.
"We have always had a good relationship with Rushden & Diamonds and their supporters, and we recently staged a bucket collection at the England C game at Sixfields to raise money for their fund to try and save their club."
The deal requires Rushden fans who have already purchased their season ticket to hand in their receipt or season ticket book at Sixfields.
An adult season ticket at Nene Park costs between £300 and £330, while the Cobblers' charges start from £350.
Northampton have also told Rushden supporters who have yet to renew their ticket they can purchase a Sixfields season ticket for the price of one for the 2011/12 Rushden campaign.
Rushden, who also face a winding-up petition, could end up in the Zamaretto League if they do not win an appeal to stay in the Conference and they meet their potential new league's conditions.