Renting a property from a resident who is not merging
When renting a property from a neighbor who does not wish to participate in the Eruv merger, how serious does the rental need to be: Eruvin 62a
Whether gaining permission from a neighbor to store a large item there is considered sufficient as "rental": Eruvin 64a
When renting a property from a neighbor who does not wish to participate in the Eruv merger, may one rent from his landlord, if the neighbor is absent: Eruvin 65b
Rental of a non-participant's property on Shabbat, itself: Eruvin 65b-66b, 67a
Whether a Jewish employee of a Nochri may act as representative of his property: Eruvin 64a