E-Sanchit document submission for faceless customs assessment requires legible, correctly tagged supporting uploads and mandatory certificates before filing. Importers and customs brokers must upload legible, correctly IRN-tagged supporting documents in E-Sanchit-technical product materials, photographs, and value-supporting documents-to enable verification of self-assessment. Duty exemption claims require meeting and documenting notification conditions and uploading requisite certificates; statutory registrations (e.g., BIS, LMPC) must be completed and uploaded prior to filing. For provisional assessment under section 18 a reason and declaration must be uploaded. Use appropriate document codes, complete first-time KYC in advance, and follow the illustrative Annexure-A list while responding specifically to any assessing officer queries.