How to tell if someone is invisible on skype

Hello everyone,
What’s up !
It’s been a week since I posted anything useful. My exams are going on that’s why I couldn’t update it more frequently.
Few of our visitors asked to share if it’s possible to verify if someone is really offline or invisible in Skype.
Well, it’s really helpful for many purposes. So let me straight go down to write how it’s done.

First  Method:
Step 1: Send them a message. ( “Them” meaning the person you want to check if he’s invisible)

Step 2: Usually when someone is offline then the message you just sent will have a pending status. And if it’s sent
successfully  then you will see the time of when they viewed your message.
Second Method
Try calling them using Skype.  Usually when someone is offline then the screen will show connecting and then the call will drop.
Since they are offline and the call will not go through. But if they are online or say invisible, it will show connecting and then
the bell will ring and it won’t stop since the person is technically online even if they are invisible. They could pretend they are offline but actually they are online.
So now that you know how to see if they are online or invisible, you can catch them red handed