Last services
Simplicity
User can change gender through simple form.
User can change first name through form.
Public identity and privacy
Service has a comment or public message system between users, in which other may have used user's former name, but those comments are hard to find if one does not know user's former name.
Last.fm
Simplicity
User can change first name through form.
Public identity and privacy
Users can change their display name, but public user id is immutable.
ETS Global
Service continuity
Support tell users to open a new account, or refuse by any means to change account name.
Countries law
Law or government explain clearly what service has to do in this situation, and they do not respect this.
Laposte.fr
Simplicity
User can change gender through simple form.
User can change first name through form.
Bouygues Telecom
Support
User needs to write to support but this is justified for legal or security reasons.
Support is polite and do not misgenders users.
Boursorama Banque
Support
User needs to write to support but this is justified for legal or security reasons.
Support is polite and do not misgenders users.
Legal verification
Legal papers are required for name, but this is justified by legal or security constraints.
Gaz Tarif Réglementé
Support
User needs to write to support explaining situation, althouth some changes could be automated with a form.
Support is polite and do not misgenders users.