"It may be that local custom and culture support slavery and that most of the population knows of its existence, but admitting it is something else again. Here false contracts conceal slavery. Slaveholders can easily force their slaves to sign anything: mortgages, loan agreements, indentures, or labor contracts. If questions are raised, signed contracts are produced and corrupt law enforcement looks the other way. Even in countries with mostly honest and conscientious police, the contracts hide slavery."