Chain Break, Gazumping or Gazundering

The house sale process is an extremely uncertain process.  You are never sure that the sale of a property will succeed until the property has been completed on.  Even exchanging contracts may not mean you have sold your property.  Many people have experienced being gazumped or gazundering.  Gazumping is where someone offers a higher offer for a property which you have had an offer accepted on.  Gazundering happens when a buyer within a chain threatens to pull out of a house purchase by demanding a larger discount from the individual selling.  These two instances put extreme stress on the sale chain, often causing it to shatter, dashing the hopes of those within it.