Hi! You don't need to send any docs/raise CSE for this credential, just mention in the IMM5669. However, Please see below the CIC instructions,
When should I contact CIC?
You must notify CIC of any changes to your application. Examples of changes include:
• Changes in your personal circumstances, such as birth or adoption of a child, a marriage or a divorce
• Change of contact information (e-mail, mailing address, telephone number)
• Appointment or change of immigration representative or designated individual
• Decision to withdraw your application.
Now, about my PCC, I did it few months back of request, so it was in my hand before to send.
Regards