It depends on the language in the deed. But, if the deed is as you say, then you would need to probate the will. You can probate a copy, but it...

Your mother to do as she pleases. The deed governs.

Contact the court. It is $6 to order it.

The handwritten note is likely not adequate. You need to open an estate, find the nephew, and see about getting consent on the property.

While not the best form, such a deed, if recorded as a gift transfer, would pass muster.

Preliminary letters allow a fiduciary to collect and sell assets, but not distribute them, or pay claims.

It is a criminal matter. The problem is proving it.

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No. Your attorney will know but you need to file a Notice of Pendency to stop further transfer of the property.

No. Even if you are appointed administrator of the estate, your siblings would still have to consent. Do not let this issue go unabated. After...

Bring a death certificate to the bank and collect your money.