However, you may need certain permissions to seek help from the court.

I was required to be within 30 minutes without special permission from the Battalion Commander

Something like "borrower shall have written permission from bank to change ownership of subject collateral.."

Good for everyone in my opinion.Just be aware from a legal standpoint that if you have paid rent through the end of April, even if you have vacated the property, he cannot move in another tenant without your permission and giving you a refund on pro-rated rent. 

Failure to obtain written permission for other animals on the property, for any reason or length of time, is cause for immediate eviction.

It says: Even if you win a bid on a Tax Sale property, within nine months of the acknowledgement of the deed, the owner of record can go to court and get permission to recover the property by paying all back taxes and the money paid by the winning bidder.

If they won't change the locks, ask them for permission to do so.

The owner is giving the bank permission to talk to me.

On top of that he is subletting my house without my permission.

If you aren't on the note, then you'll either need permission from the borrower on the note (in writing and filed with the servicer) or have the borrower on the phone with you when you speak with them initially.