What is a COH?

What does COH stand for? In reference to AOH & W-9?

Give some more context such as a location, well name.
COH could mean any number of things such as Carbon, Oxygen, Hyrdrogen or something else.

I would guess AOH could be affidavit of heirship, and COH may be something of heirship? Possibly to establish your relationship and/or identity to a deceased party in title that an operator needs/wants to get cleaned up.

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COH might be Change of Ownership.

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Maybe certificate of ownership.

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