[mothered]

If I understood correctly, every signed document that "verifies that everything you've said Is true and correct" is technically legally binding. Even if it is an internal company document.

No.

As said, the document must be passed by legislation deeming It legally binding and/or signed In the presence of an authorized witness. An Internal company document that's purely generated by the company, Is not legally binding - they've simply documented everything themselves, so It's fine to go ahead and sign It.

The only way it could be not binding is if the company makes there error of stating "to the best of my knowledge".  Is that correct?

The wording (to what you've described), doesn't define whether or not It's a legal document, the law does.

Mine has the company logo and just states "DECLARATION".

I'm debating if I should sign it at this point, as the SE is not high-value and I could technically afford it and use the DNA for a higher value item in the future

Ultimately, It's your call.