Foreign Player Access on Claim

Guys Recently a friend of mine had a named donkey with a chest of goods in it. Since it was in my claim, I decided to let her keep it in my claim. I had it leashed and all when someone named loglog25 came and stole it and rode away. Please help!

P.S. My ingame user is TheJolteon27

 

Here is what he said

 

Unfortunately, there's not much that can be done without video evidence. Chat evidence isn't very good evidence, since anyone can type that without actually committing the act. So, unless you have video evidence, nothing can be done. Sorry, TheJolteon27.