In order for a Lichess user account to be given a FIDE or NM title, the user must fill out the title verification form on https://docs.google.com/forms/d/e/1FAIpQLSd64rDqXOihJzPlBsQba75di5ioL-WMFhkInS2_vhVTvDtBag/viewform (now also requiring a selfie with the identity document). All title requests should be funneled into this form.

When the provided information is verified, the correct title can be set by a Lichess moderator and the player will be informed automatically by email. If the request is rejected, the user has to be informed manually.

NM titles

Russia

• We accept: ГР/GM, MC/Master of Sport (2400+ for men, 2200+ for women)
• We don't accept: KMC

Czech

http://www.chess.cz/sachovy-svaz-cr/legislativa/klasifikacni-rad-sscr/

• We accept: MC (2300+ for men, 2100+ for women)
• We don't accept: KM

Indonesia

Lookup tool, based on https://www.pbpercasi.com/p/blog-page_22.html.

• We accept: MN

Canada

NMs list

• We accept: NM (2200+), WNM

Israel

http://www.chess.org.il/ContentPages/ContentPage.aspx?Id=58

• We accept: Artist (2290+), Senior Artist (2400+)
• We don't accept: Candidate for the Artist (2070+), Senior candidate for the artist (2180+)

Poland

http://katalogbazszachowych.pl/

• We accept: M
• We don't accept: K++, K+, K

Costa Rica

https://fcacostarica.com/jugadores/

• We accept: NM

Italy

• We accept: Master (e.g: http://www.torneionline.com/giocatori_d.php?progre=18118&tipo=a )

More info

Relevant Gmail canned responses

• Title: Request docs
• Title: Confirmed