What was added to the constitution to get it ratified?

In September of 1787, it was sent to the states for ratification. Nine of the 13 states would have to ratify it for the Constitution to become effective for those ratifying states. The future was not certain at all—a debate began among the states over ratification.

On September 17, 1787, a majority of the delegates to the Constitutional Convention approved the documents over which they had labored since May. After a farewell banquet, delegates swiftly returned to their homes to organize support, most for but some against the proposed charter. Before the Constitution could become the law of the land, it would have to withstand public scrutiny and debate. The document was "laid before the United States in Congress assembled" on September 20. For 2 days, September 26 and 27, Congress debated whether to censure the delegates to the Constitutional Convention for exceeding their authority by creating a new form of government instead of simply revising the Articles of Confederation. They decided to drop the matter. Instead, on September 28, Congress directed the state legislatures to call ratification conventions in each state. Article VII stipulated that nine states had to ratify the Constitution for it to go into effect.