I moved into a house and started paying rent of $110 per week however I was unaware that none of the other tenants (and hence myself) were on a contract so we were essentially squatters. The electricity bill was also in the name of another tenant living there. After a while we were evicted by the landlord as we did not have a contract. This was a surprise and disappointment at the same time since I needed a place to live and study (I am a university student).
Now 8 weeks after we were all evicted the tenant that had the electricity bill received the final bill and now expects me to pay part of it despite the fact that I wasn't even living there for 2/3 of the billing period (4 weeks of the period I was there, then got evicted and 8 weeks I was not there and the billing period is 3 months or 12 weeks). My name is not on any rent or utility contract so I'm not even sure if I am legally obliged to have to pay that money to him (it's about $50). What are my options?