In the following paper, we propose a database for latent palmprint identification:
A. Morales-Moreno, M. A. Medina-Pérez, M. A. Ferrer-Ballester, M. García-Borroto, and L. Altamirano-Robles, "LPIDB v1.0 - Latent Palmprint Identification Database," in: IEEE International Joint Conference on Biometrics (IJCB 2014), Florida, USA, 2014, pp. 1-6.
The paper contains further instructions to acquire the database.