One time I went to the doctor office for SSDI evaluation. I got an interpeter for my DR appointment and did not recall her name. I thought she was a qualified ASL interpreter, but it turned out she was not because she often misunderstand my signs. I told DR to hold on for a minute, he understood. I BLUNTLY asked her, "Are you a certificated ASL interpeter"? She honestly responsed to me, "no. I am sorry" in several times. I politely nodded at her statements as I was very miffed inside. When the meeting was over, I thanked her for interpreting me even though she SUCKED. Afterwards, I never see her again ever since. She is a lousy interpreter.
