This final chapter on mechanisms argues that recipients of electoral gifts have a partisan view of ballot secrecy. When opposition recipients only see machine representatives in their voting place on Election Day, they fear that ballot secrecy could be compromised and are more likely to believe the machine’s threats to impose costly sanctions for voting their sincere preferences. Recipient compliance is thus more likely in machine-dominant constituencies. When recipients also see opposing-party representatives at the polls, they are prone to believe that ballot secrecy is preserved and that they can vote their true preferences without incurring costs. This argument provides a new rationale for the protective influence of poll watchers and adds nuance to the standard institutional claim that de jure ballot secrecy alone undermines vote buying. Tests use observational survey data, survey experiments, and fieldwork in Mexico.