I recommend use of a one-time-message like 1ty.me – One Time Self Destructing Links For Sharing Sensitive Information which will self-destruct after reading
In the event that your social media platforms or blogs ever get compromised, they would have access to your PM history.
If you need to send a password or some other form of simple but sensitive information to someone you can not send it over IM or email. These methods are not secure as anyone with little knowledge can intercept this information during transmission. Using 1ty.me as the “middle man” you can safely and securely transfer this data to your recipient.