此类欺诈性信件可能具有以下特点：
1、使用与世界知识产权组织或外国商标主管机关相似的名称 、简称或者标志；
2、包含马德里国际注册号、申请人信息、商标图样、指定的商品或服务描述等细节信息；
3、许诺提供注册、续展或监控等服务从而提出付款要求；
4、 利用其他方式表达了必须支付所要求金额的意思等。
世界知识产权组织已在其网站上发布了相关警告：
http://www.wipo.int/pct/en/warning/pct_warning.htm
收到此种付费信件的申请人或代理人，在签署回复文书或付款之前请仔细核查其内容及来源，可与商标局或世界知识产权组织联系确定。
世界知识产权组织联系方式：004122-3389111
ABOUT AGAINST MADRID INTERNATION TRADEMARK REGISTRATION FRAUD
In Madrid International Trademark Registration, some applicants and representatives have received some oversea letters and notifications which require paying fees for trademark registration. Furthermore, Some of these letters and notifications are not official or authorized by official. So, We hope applicants and representatives can raise awareness.
These letters and notifications may have following characteristics:
(1) Using similar names, abbreviations or signs to WIPO or other foreign trademark offices;
(2) Including Madrid International Registration Number, applicants information, trademark signs, goods or services information and so on;
(3) Promising they can provide services for registration, renewing or monitoring and requiring paying fees;
(4) Requiring paying fees by other means and so on.
WIPO have posted related information:
http://www.wipo.int/pct/en/warning/pct_warning.htm
China Trademark Office: 010-88650662
U367662736
U867656588
