Please review my Deposit refund letter - Charges due! - PA

[Shannon Trivett]

Tenant moved in July 15, 2015 with a one year lease. Tenant informed me in June of 2016 they would need to move in January 2017 so I didn't do renewal paperwork. I was sloppy on the initiall lease and and missed the renewal check boxes on the lease.  Shown below:

Tenants have since sought divorce and have vacated. Last rent payment was made on 7/15/16 paying thru 8/15/16
I was notified on 9-2-16 that I should use the sec. deposit for the 8/15/16 - 9/15/16 rent and they would be out by 9/15/16

I sub-meter the water via Guardian. 

below is the letter I would like to send to the former tenants. Can anyone tell me for sure if I'm able to charge a month's loss due to improper notice?

Would you change the way anything is stated?

i will attached the water bill and some photos of crayons, wall paper damage and general dirty-ness to the hard-copies I mail the tenants. I could also post here if anyone is curios. 

[JD Martin]

One thing I would do with the lease is spell out the charges in letters and numbers, i.e. : "Six hundred seventy-five dollars ($675.00)". This makes it far more difficult for anyone to alter the lease, or claim they thought the seven was a one, etc. 

They went month-to-month in my opinion after the lease was up since you didn't fill the lease out properly. Does your state allow you to unilaterally lock someone into another year's agreement without explicit signature? 

You should have moved (did you?) to evict when the month of August was unpaid. Can't really say on the damages. Typically the tenant is provided the ability to bring the unit back to as-was when they leave, did you do a final walk-through when you got the notice?