Automotive News has obtained a copy of a letter sent to Faraday Future by AECOM, the building contractor that's responsible for around US$500 million ($657 million) worth of work on the US$1 billion ($1.3 billion) factory.
In the letter, AECOM demands that the prospective car maker pay the US$21 million ($28 million) that was due in September, noting that failure to do so within 10 days would see work grind to a halt.
AECOM and Faraday Future put out a joint statement to the industry publication stating: "The business relationship between Faraday Future and AECOM is strong and we remain committed to building our factory of the future in North Las Vegas."
Above: Faraday SUV seen testing in August.
Separately, a Faraday spokesman reassured Automotive News that there would be no work stoppage, and that the company was working with AECOM to resolve the issue of the overdue payment.
Work began at Faraday's future factory in January this year, with a ceremonial ground breaking held in April.
The company made a splash at CES 2016 with the FFZERO1 concept, an all-wheel drive electric supercar with a total of 745kW of power.
While the FFZERO1 concept was a pie-in-the-sky fantasy, it's said to be based on a scalable platform, which can be used to underpin a range of electric vehicles of different sizes and shapes.
MORE: Faraday Future news