how to know if they block or delete you on their skype contac

"this person hasn't shared their contact info with you"
"Contact request pending"
And the  icon mean that you have been DELETED from that person's contact list.

You can still send them messages, phone calls, and they will see them. If you do, you will appear in "Recent actions" tab next to the Contact list tab. If you don't, well that person will never see you.

You'll NOT see their local time and/or Contact count if they have it set to Contacts only. If they have it set to Private, well you wouldn't see it no matter what lol.
You will also NOT see their mood message, as they are not considered on your contact list vice/versa

You also appear as a grey "?" for them in that "Recent Actions" tab.

That person can still click on the "Accept this contact" blue button on top of a conversation with you if you still have that person in YOUR contact list.
IF you delete that person as well, that person, and you, will need to send a new friend request.


When you are BLOCKED HOWEVER, you ALWAYS see that person OFFLINE.
You can still see their previous profile picture and mood messages, but can't see new ones until they unblock you.
If you try to send them messages, you won't have a notification, and they will NOT receive them.
You will still see their profile
However, the moment they unblock you, AND send you ONE message, they will see the messages you sent them while you were blocked, retroactively (ie: above their message they just sent you)
If you send them a message after they unblocked you, but they don't reply, they still won't see the previous messages sent while you were blocked.
If you try to send a phone call, it will act as if they were offline: "Phone call: No answer" automatic failure after 5-10 seconds. Meaning they can't even see it nor reply to it.
The person that blocked you can also NOT send you messages nor phone calls.

Source: I spent an hour doing tests between two skype accounts, you can do the same with windows+R to open the Run Command Prompt and type
Windows 32 bits: "C:\Program Files\Skype\Phone\Skype.exe" /secondary
Windows 64 bits: "C:\Program Files (x86)\Skype\Phone\Skype.exe" /secondary

Tl;dr If you are deleted you will see  but can still send and receive messages and phone calls, if you are blocked you will see that person offline 24/7 and they will not see your messages nor phone calls.
There is no way to know for SURE if you are blocked


source : skype