Riddle Me Ridiculous

Well if you thought the one before was absurd, then click on the title and tell me of this one.

When first you meet me, meet me well,

Be strong, agree, reach the hard sell.

But if you don't, give me in gold,

Not legal, but effective. Hold

And keep, I sign sincere.

When you let go, I disappear.

'Good job, by jove, you've done it again!'
'That's jolly good, whole-hearted men!'


Riddle Answer A Handshake


Riddle Explanation
but if you don't, give me in gold, not legal, but effective - a golden handshake.