Duplicity is not a town in Duploland.
It is a behavior that quickly undermines a leader’s credibility and trustworthiness. It happens when a person acts or talks in two different ways with the intent of hiding their true intentions or desires. 
That behavior represents hypocrisy in its truest form. And it is not a behavior becoming of authentic leaders.
Surprisingly, it becomes an issue when a leader wants a certain outcome that doesn’t align with the stated Core Values of the organization.
Are your Core Values really your core values?
It’s amazing how some leaders refer to the organization’s “Core Values” when those value statements conveniently support their personal preferences or agenda. But when the leader’s desired results are contrary to the same value statements, they are avoided or ignored.
For example, a value statement declares that “Truth and Authenticity are the Foundation of Good Decision-Making.” However, the leader withholds key information from the decision-makers and stakeholders because those details would influence an outcome opposite to the hoped-for actions.
Another example could be the Core Value of Relational Integrity. One company words it, “People First.” That’s simple enough to understand. Relationships within the company are a priority. Customer interaction is driven by a relational approach, not a transactional mindset. And yet, when the leader micromanages their staff and uses an authoritarian approach, trust levels plummet. At which point, good people do one of two things: only what is necessary to get by or take their skills to a better environment.
Core Values are supposed to define what we believe to be the highest priorities and the accompanying behaviors that support them. Leadership integrity and actions consistently aligned to those values are what validate, reinforce, and sustain the culture you want. Anything less than that diminishes the value of your values and discredits your integrity.
Consistency creates confidence.
Compromise erodes confidence.
The fastest way to ruin your credibility is to ignore those core values for the sake of your own convenience. The surest way to keep yourself (and the organization) on the high road of integrity is to value those core values more than you value the shortcuts to a personal preference.