A New York sublease agreement is a document that allows an initial tenant (a sublessor) to rent out the property to another tenant (a sublessee), either in full or in part. In New York, an original tenant has the right to sublet the property if they have permission from the landlord.
The initial tenant remains bound under the lease terms, so if the sublessee breaches the lease, the initial tenant is liable. A sublessor must honor the terms of the sublease agreement (as well as the original lease) and follow all New York laws regarding the eviction process, security deposits, and all other landlord-tenant matters.