You need to check your tutor's qualification.  When parents asked me about my qualification, I do not mind at all.In fact, it's a good chance to brag about the scholarship I get from NUS.
If a tutor refuse or get offended when asked about her / his qualification,you should get suspicious       
My Qualification
I am an NUS Graduate with Scholarship worth $1350 per month. These are my certificate and scholarship letter.
This is my Master degree certificate from NUS in Civil Engineering.
I get a  scholarship from NUS for my Master degree in Civil Engineering in 2000.
Here is the letter from NUS offering me scholarship.