I would still see this letter as appropriate, with minor tweaks, to a company “in good standing.” (More broadly, I’m not sure I know of even a single company I

I would still see this letter as appropriate, with minor tweaks, to a company “in good standing.” (More broadly, I’m not sure I know of even a single company I would consider to be in good standing on this topic without first making them prove it. Certainly not any medium-sized or large company, however good-natured they might seem.)