Pre-selected options, also known as defaults, have been shown to influence choices about everything from organ donations to retirement savings and mundane consumer decisions. Yet, boundary conditions of default effects need to be understood to determine their legitimacy as a behavioral policy instrument. Although default effects are multiply determined, they partly work through being perceived as recommendations by the source, the choice architect. This implies that trust in the choice architect may play a role in default effects. In default experiments in two countries – the Philippines (n = 909) and the U.S. (n = 925) – we manipulate trust. As expected, we find a strong default effect on the choice of energy-efficient appliances, which is of similar size across the two countries. The trust manipulation significantly influenced trust in the choice architect (the real estate agent) and the number of energy-efficient appliances chosen in the U.S. However, it did not change the default effect, which seems robust against mistrust in the choice architect. All in all, the study speaks for the robustness of default effects. The fact that the default effect is robust even when used by untrustworthy choice architects calls for regulation of its use.