REDRESS and 70 other organisations have sent this letter to the UK, US and Canadian governments urging greater coordination between them on the use of Magnitsky sanctions to promote respect for human rights. The UK, US and Canada are the only countries with legislation enabling targeted human rights (‘Magnitsky’) sanctions, which impose travel bans and asset freezes on individuals and entities for human rights abuses. By naming and penalising individual perpetrators, sanctions can serve as a useful tool in deterrence, promoting accountability and prompting behavioural change.