Raise your hand if this has ever happened to you: 

The other side thinks your client so plainly — and evilly — copied software source code that their lawyers can't imagine losing. They have such clear proof, they believe, they almost sneer at you. And the smugness infects all that they do in the case.

The chain works like this:

The online hawkers of handbags bearing the label of a famous high-end maker get their website services from a firm that "hosts" the websites (running the servers, granting "bandwidth", and giving IP ("Internet protocol") addresses) — all for a fee. The hosting firm in turn obtains the servers, bandwidth, and IP addresses under leases from an outfit

The inventor from New Jersey, Thomas Sullivan, tried to charm a Tennessee company, Radio Systems, into paying him for a license to make and sell his invention. Radio Systems at length agreed to let Mr. Sullivan drop by to show them his device, which he called "Wedgit" and on which he held a U.S. Patent. But first he had to sign a Confidential

Doing things out of proper sequence can require a do-over.  But in law, as elsewhere, the do-over may come too late. 

Just ask Abraxis, a drug maker that today lost a lawsuit because the company it bought patents from didn't own them at the time.

Abraxis signed an Asset Purchase Agreement with AstraZeneca in April 2006. 

Russian scientists come up with a way to make an ozone-friendly agent that helps prepare materials useful in making units that store hot or cold.  They tell the American company that hired them about the results of their study.  And the U.S. firm starts using the process that their Russian colleagues discovered.

Does the U.S. outfit qualify