Per 
SCP-4xxx
Class:Keter
Special containment procedures:The subject has no containment cell,but can be lured to the wanted place with large amounts of information,such as flash drives or libraries.
Description:SCP-4xxx is a blue Post-it note featuring 76x76 mm in size.The subject is capable of teleportation,which makes it impossible to contain.It is worth mentioning that SCP-4xxx can socialize via writing words on its surface.The subject’s origin is unknown,however it claims to be an another universe.SCP-4xxx’s main threat comes from its knowledge.It has been reported several times, that SCP-4xxx has leaked the Foundation’s secret files to Class-D personnel and Chaos Insurgency.Despite of that SCP-4xxx tends to help the Foundation, especially in Containment Breach events.
SCP-4xxx is useless to destroy as it reappears after two hours in its preferred place.
The subject seems to be fully aware of the Foundation and most of its objects.It claims that it has knowledge in most of the things there are, but it is still seeking new information.
SCP-4xxx communicates in a joking manner, often being sarcastic.It can’t resist to make a joke about someone, it has a conversation with.
Addendum SCP-4xxx 01:
Interviewer:Dr.[redacted] Jherth
Subject:SCP-4xxx
Goal:Find more information about SCP-4xxx’s nature.
<Begin Log 07/04/94>
Interviewer:Hello.How would you like me to call you?
Subject:*starts to write words:Call me Mat,Dr.[redacted]*
Interviewer:How do you know my name,Mat?!
Subject:Doesn’t take much time for me to know a human.I’ve been on this planet for 18645 years.
Interviewer:You even know the questions?!
Subject:Is it illegal?
Interviewer:Alright,Mat,why exactly are you seeking knowledge?
Subject:To use it.
Interviewer:For what?
Subject:This will come to you later.
Interviewer:Why do you spread our secret information?
Subject:I will tell you later,now let’s do tests.
Interview:Please,answer now.
Subject:It is to come later,I said!
Interviewer:Fine,you are free to go.
<End Log>
Closing Statement:Further interviews shall be made.
Addendum SCP-4xxx 02
Interviewer:Dr.Jherth
Subject:SCP-4xxx
Goal:Find out what is the knowledge of SCP-4xxx
<Begin log 16/04/94>
Interview:So what is it that you know, and what are you going to do with it?
Subject:I know many.Here come my powers.
Interviewer:What powers?
Subject:Other SCP’s powers.But I need a human form for it.
Interviewer:And why exactly do you need those powers.
Subject:When the time comes,I shall be unstoppable.
Interviewer:Alright,do not create more questions…just answer straight!
Subject:OK,I need those so the Foundation has a powerful ally.
Interviewer:Great!Now may I know some of your abilities you can’t use?
Subject:073’s abilities;049’s.
Interviewer:And where did you obtain those?
Subject:I was studying them,i put effort.
Interviewer:Okay,now.How would you feel about being destroyed?
Subject:I don’t care,do whatever you want.
<End Log>
Closing Statement: Tests shall be made.An attempt to destroy it should be firs on the list.
