  Continuous-variable quantum information, encoded into infinite-dimensional
quantum systems, is a promising platform for the realization of many quantum
information protocols, including quantum computation, quantum metrology,
quantum cryptography, and quantum communication. To successfully demonstrate
these protocols, an essential step is the certification of multimode
continuous-variable quantum states and quantum devices. This problem is well
studied under the assumption that multiple uses of the same device result into
identical and independently distributed (i.i.d.) operations. However, in
realistic scenarios, identical and independent state preparation and calls to
the quantum devices cannot be generally guaranteed. Important instances include
adversarial scenarios and instances of time-dependent and correlated noise. In
this paper, we propose the first set of reliable protocols for verifying
multimode continuous-variable entangled states and devices in these non-i.i.d
scenarios. Although not fully universal, these protocols are applicable to
Gaussian quantum states, non-Gaussian hypergraph states, as well as
amplification, attenuation, and purification of noisy coherent states.
