What is it called if congress adjourns before the president signs a bill and the bill dies?

First, a bill must pass both houses of Congress by a majority vote. After it has passed out of Congress, it is sent along to the President. ... However, if the Congress has adjourned before the ten days passes and without a Presidential signature, the bill fails. This is known as a pocket veto

It is called a pocket veto

This reflects the basic human right to due process. It is one of the five basic human rights: the right of free consent, the right of privacy, freedom of conscience, freedom of speech and right to due process. The right to due process is described in the Fifth and Fourteenth Amendment of the United States Constitution. It focuses on the administration of justice and it protects citizens from arbitrary violations of their rights to life, liberty and property.