Stated preference data for analysing willingness to become an occasional carrier in crowdshipping service. With this research, it is aimed to investigate the willingness of travelers to execute crowdshipping deliveries in a crowdshipping system with complementary parcel lockers. We explicitly consider crowdshipping deliveries during planned commute trips as newly generated delivery trips. Additionally, we aim to investigate the heterogeneity in preferences amongst those who might become occasional carriers. An online survey was designed to collect the data and discrete choice models are used to analyse the choice data.