好一陣子之前有收到PMI來信通知，證照的有效時間從原本的三年改成四年，雖然認証時間改成四年，但是要注意事項是還是必須在三年內取得60 PDU。
When you are ready to renew your PMP credential, please follow these steps before 01 July 2012.

．Earn a minimum of 60 Professional Development Units (PDUs) within your 3-year certification cycle.
．Report a minimum of 60 PDUs online at PMI.org.
．After you report at least 60 PDUs, you will receive an e-mail from PMI with a link to your renewal form. Please allow a minimum of 3 weeks for approval before the renewal link will be available.
．When you are ready to renew your credential, fill in the renewal form you receive in an e-mail from PMI and submit the renewal fee through the online certification system.

[如有錯誤，歡迎指正]