Short Term Let - WHP (Less than 3 months)

Hi, so I just got my Work Holiday Pass approved and looking to get it issued. I have an internship that lasts for 2 months and get an accommodation from friends of friends at a condo. I just read a rule in Singapore that there is a minimum of 3 months let of private residence to foreigners. I need to show a proof of accommodation to get my pass issued such as a tenancy agreement. Is there a way to solve this problem? If I say that I'm staying at a friend's or relatives place during those two months for free, can I get away with this? How do I show the proof of accommodation? Thank you.

Just show a letter written by your hosts, saying that you will stay with them for free.
Rented accommodation is indeed not possible for such a ahort te - you could only stay at hotels, hostels and serviced apartments (minimum cost around S$2000/month).