The guidelines
https://en.numista.com/help/authors-217.html
https://en.numista.com/help/editors-218.html
have the link for open a ticket on the forum to add additional information about the author/editor
https://en.numista.com/forum/ecrire_post.php?f=14&t=author
However the forum does not offer the option to open this ticket (and the translation area does not include the text either).
For example, I wanted request the modification of an author but I had to use the “requesting the creation or the modification of a reference catalog” option. https://en.numista.com/forum/topic167789.html