Question

What did the creators of the declaration feel compelled to do in order to maintain their credibility

Answer 1

To keep their credibility they had to provide specific information of how exactly they were being mistreated

Answer 2

They added their own signatures to the document in order to show commitment. They also added to the Declaration specific examples of how they were being mistreated, as evidence, to maintain their credibility. A few examples are:

He has refused his Assent to Laws, the most wholesome and necessary for the public good.

He has forbidden his Governors to pass Laws of immediate and pressing importance, unless suspended in their operation till his Assent should be obtained; and when so suspended, he has utterly neglected to attend to them.

He has refused to pass other Laws for the accommodation of large districts of people, unless those people would relinquish the right of Representation in the Legislature, a right inestimable to them and formidable to tyrants only.

He has called together legislative bodies at places unusual, uncomfortable, and distant from the depository of their public Records, for the sole purpose of fatiguing them into compliance with his measures.

He has dissolved Representative Houses repeatedly, for opposing with manly firmness his invasions on the rights of the people.