Removal
Or just reply REMOVE to whatever email brought you here. Either works. You do not need to explain, and we will not ask.
If you would rather we not keep even the hash, say so in the same email and we will delete that too. The trade-off is that we then have no way to recognise you, and a future list built from public publication records could surface your name again.
The corresponding-author line of a paper you published. We did not buy it, and it was not passed to us by anyone. The full explanation is on the privacy page.