If you're mind has gone up the right path and you wish to guide others, leave directions below.

A document for when you're gone

With testament to who hang on

And tense, ironically not yet

I'm of the wisp, you never get

A little form of Yeats or Blake,

Of Shakespeare, and I i am make.

'Is it a train ticket? That's a document for when you're gone!'
'That's a document for when you're going.'
'Going where?'
'Well it depends what's written on the train ticket.'

Riddle Answer A Will

Riddle Explanation
a document for when you're gone - the legal document.

with testament to who hang on - last will and testament.

and tense, ironically not yet - an auxiliary to make future tense.

I'm of the wisp, you never get - will o' the wisp, or an unattainable goal. It derives from one of the names of a marsh gas phenomenon that causes lights to appear, which are unattainable or impossible to catch.

a little form of Yeats or Blake, of Shakespeare, and I i am make - a shortened form of William, Wilfred, or Willard. Reference here's are for William Shakespeare, William Butler Yeats, William Blake, and will.i.am.