I am currently renting a commercial building and am going out of business and have let the landlord know I wasn't doing well. I signed a 6 month lease and that expired 3 months ago and have been just making the rent since then I am going out of business and can't make rent and gave the landlord 15 day notice and they are saying I have to give 30 days notice and no where in the original lease agreement did it say I had to give any notice. The landlord took the check for half a months rent and now is demanding the rest. The Landlord also has a $800 deposit and I have a feeling I won't be getting it back by the way the landlord is acting. Am I wrong or did the lease expire and I have no obligation to them?