# TlsBulkCertificateResponseAttributes ## Properties Name | Type | Description | Notes ------------ | ------------- | ------------- | ------------- **created_at** | Option<**String**> | Date and time in ISO 8601 format. | [readonly] **deleted_at** | Option<**String**> | Date and time in ISO 8601 format. | [readonly] **updated_at** | Option<**String**> | Date and time in ISO 8601 format. | [readonly] **not_after** | Option<**String**> | Time-stamp (GMT) when the certificate will expire. Must be in the future to be used to terminate TLS traffic. | [readonly] **not_before** | Option<**String**> | Time-stamp (GMT) when the certificate will become valid. Must be in the past to be used to terminate TLS traffic. | [readonly] **replace** | Option<**bool**> | A recommendation from Fastly indicating the key associated with this certificate is in need of rotation. | [readonly] [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)