If there isn't any customer set on the task, the current behavior will display 'Hello False,' in salutation rating email as intro. This commit will fix it by display only 'Hello,' if there isn't any customer set. Task ID 2238816 closes odoo/odoo#50366 X-original-commit: e7b71c6e497aa8d823181440333f371f1da5ade8 Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>