Been doing this for 25 years---and many years ago 'the whole 9 yards' was the only way. Then, it changed to 'Name, Trustee', now it seems that just 'Name' is sufficient. Just do what they want and, if they don't provide instructions, I always call & ask.
Yep, it does bug signers when they want the whole 9 yards, but it is what it is. Recently had one where all they wanted was a signature, BUT, the Trust signers said their attorney told them they ALWAYS had to sign the whole 9 yards. They called their attorney and he confirmed that. Then we called Title who said no. Then they called their attorney and HE called Title and said 'oh, yes...whole 9 yards'. Title then agreed.