Co-signing an apartment lease is a serious responsibility. A cosigner is legally just as responsible for the rent and other expenses as the primary renter, even though he or she has no legal tie to the property. For more details, you can go for https://www.nyrentownsell.com/blog/co-signer-for-apartment-lease/ now. Never agree to cosign unless you are prepared to pay the full rent if the main tenant fails to do so.