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New Validation Requirements for Transit Shipments from Private Locations Effective June 4, 2024

  • Starting June 4, AEAT computer system will validate transit issuance declarations from private locations
  • Declaration of authorization type C521 (ACR) with holder listed as Obligated is necessary
  • ACR authorization must contain customs office of departure in box 4.15
  • Declaration of authorization type C523 (SSE) and declaration of seal required, unless specified as “WITHOUT SEALS”
  • Transit forwarding operators must have ACR and SSE authorizations by June 4
  • Operators without proper authorization must request it or request modification by the deadline


Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.


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