Move out notice with my wife's signature. However my wife moved to India?

Our 6 month lease is expired and We are on month-to-month rental now. Due to compatibility issues, my wife moved back to India 3 months back and disconnected all the communications with me. I staying alone for past 3 months and paying the rent.

Now I am planning to move out, but my landlord asks written notice with signature from my wife? Is there anyway I could move out without my wife's signature?
Yes. Give the landlord your written notice with an explanation that your wife has left the country and there are no remaining occupants.
It doesn't matter that the landlord wants her signature. It isn't necessary. Landlord can live with disappointment.