How does a boxing contract work anyways?

The only differences I know of from a "normal" contract (like agreeing to car payments) is that sometimes the alphabet orgs will oversee a title fight contract as a third party mediator and of course since you're engaging in a sporting competition not trading material goods, the commission has to sanction the fight. Probably 75% of the fights that are "being finalized" on here never happen so until it's official (contracts signed) take it with a grain of salt.