transfer between two functions where all benefits are exchanged without the stipulations. Collateral project is yet another term because of this.
Assignment where all (and not merely some of) advantages, liabilities, and/or liberties are transmitted by one party to a different, without the pre-condition. See additionally collateral project.
At English common law debts and other choses in action were not assignable (see CHOSE), but by the Judicature Act 1873 any absolute assignment of any debt or other legal chose in action, of which express notice in writing is given to the debtor, trustee or other person from whom the assignor would have been entitled to receive or claim such debt, is effectual in law.