Beside the word WITNESS.

That word is doing an enormous amount of work and I did not understand it until I sat with those books for two hours.

A witness is not a participant.

A witness is a required third party whose entire function is to attest that a thing occurred.

The form needs two of them.

It does not need him; it needs two of whatever is available.

He put his name on hundreds of the most important documents other people will ever own, in the box that means I was in the room and I do not matter.