Of course, there are exceptions to the rules below and every situation will look different at every turn.

For what properties and situations it is most useful. 

premium for A1 service, in certain situations.

Perhaps you had a situation in the past where you did not pay a bill.

Outside either of those two things you really better hope the stars align in your favor in court and have an absolute airtight lease that backs up your actions.I'd issue the 30 day notice (be civil, no need to further deteriorate the situation with hostility even if you would prefer to kill them...) and make the primary goal to just get your property back. 

What resources do I have in this situation? 

One of the times I attempted to bring up this situation, they told me that they don’t even let their child into the backyard since the dogs are so territorial (sounds like fun when they break down the fence). 2) I am trying to determine if I should sell or rent my house.

One of the times I attempted to bring up this situation, they told me that they don’t even let their child into the backyard since the dogs are so territorial (sounds like fun when they break down the fence). 2) I am trying to determine if I should sell or rent my house.

@william jones, I personally had a similar situation on an inherited tenant who defaulted after 3 month of acquiring the property.

Although I have already read about the laws related to security deposit matter in CA Civil Code Section 1950.5, I would like the property owners with similar experiences to me consider my situation and advise me regarding the following items1- How to calculate their security deposit and provide an itemized list, while I do not have any invoice in my hands. 2- As my tenants have not left any forwarding address, shall I contact and ask her the new address for sending the itemized list?