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The last complete attestation, present only when the provider answered fully and the answer was rejected for disagreeing with the expectation. A refusal raised because no attestation could be formed leaves it unset.
Whatever the provider did report. Always present, including when the refusal is "it reported nothing", where it is empty.
The last complete attestation, present only when the provider answered fully and the answer was rejected for disagreeing with the expectation. A refusal raised because no attestation could be formed leaves it unset.