Depending on the situation it might be very obvious (they republish it after the deletion request) or you might not know without examining their system directly.
There are a number of options depending on the context. If Tent ends up like email (90% of users spread across a handful of service providers), then one term of the license could be consent to regular audits by mutually trusted individuals or organizations (e.g. the EFF).
There are a number of options depending on the context. If Tent ends up like email (90% of users spread across a handful of service providers), then one term of the license could be consent to regular audits by mutually trusted individuals or organizations (e.g. the EFF).