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This document is a stage-by-stage reference of every event recorded in the session journey. For the concept of the session journey and how to interpret it, see the Session Journey overview first.

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How to read the tables

  • Source — FE: an action observed on the user’s screen · BE: a verification or decision executed on the server
  • User impact — NONE no impact · BLOCKED blocked · RETAKE recapture / retry · PENDING hold · REJECTED rejected · APPROVED approved · COMPLETED stage completed
The tables are organized by stage, but events within a single stage may run concurrently. Keep in mind that the display order does not necessarily imply causality.

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Session start · entry

EventSourceMeaningUser impact
SESSION_CREATEDBENew LiveForm session created, Session ID issuedNONE
SESSION_REUSEDBEExisting in-progress session reused within 20 minutesNONE
FRONT_SESSION_STARTFESession start signal from the screen (paired with SESSION_CREATED)NONE
FRONT_SESSION_RESUMEDFESession resume signal from the screen (paired with SESSION_REUSED)NONE
PROJECT_OPTIONS_FETCHEDBEProject verification options retrievedNONE
NATIONALITY_INFO_LOOKUPBEIP-based country information lookupNONE
FLOW_ID_ISSUEDBEFlow identifier (Flow ID) issuedNONE
LIVEFORM_HASH_CREATEDBEHash created for mid-flow resumptionNONE
CHECKPOINT_HASH_CHECKBEVerification of whether mid-flow resumption is allowedBLOCKED
STEP_VIEWFEGeneral screen entry (which screen is identified by the path)NONE

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Pre-checks · blocking (Guard / policy)

EventSourceMeaningUser impact
TOKEN_VALIDATION_CHECKBEPrivate-mode token validity and expiration checkBLOCKED
PRIVATE_TOKEN_USAGE_RECORDEDBEFirst use of a private token recordedNONE
PERIOD_CHECKBEDuplicate-submission policy check for approved/rejected/heldBLOCKED
PACKET_ABUSE_CHECKBEStep1 packet and Flow ID reuse checkBLOCKED
TURNSTILE_TOKEN_CHECKBEBot-protection (Turnstile) token checkBLOCKED
IP_RISK_CHECKBEIP risk and blocklist checkBLOCKED
RATE_LIMIT_CHECKBESubmission frequency limit (Rate Limit) checkBLOCKED
DEVICE_VERIFICATIONFEDevice anti-spoofing verification result (observed on screen)NONE
DEVICE_VALIDATION_RECORDEDBEDevice verification result recordedBLOCKED
FINGERPRINT_CHECKBEDevice fingerprint duplication and device checkBLOCKED
FINGERPRINT_SUBMISSION_LINKEDBEDevice fingerprint verification linked to the submissionBLOCKED

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Observing API calls from the screen (FE)

These events record the moment the screen called a specific API. The server-side result of the same action is logged separately in the corresponding BE event (marked with ↔ below). If the call itself fails, it is logged as API_ERROR.
EventSourceMeaningUser impact
CREATE_FLOWFEVerification flow creation request (↔ FLOW_ID_ISSUED)NONE
GET_PROJECTFERequest for the full project configurationNONE
QUERY_PROJECT_OPTIONSFERequest for individual project options (↔ PROJECT_OPTIONS_FETCHED)NONE
GET_NATIONALITY_LISTFERequest for the country information list (↔ NATIONALITY_INFO_LOOKUP)NONE
CHECKPOINT_HASHFEMid-flow resumption hash creation/verification request (↔ CHECKPOINT_HASH_CHECK)NONE
HANDLE_LINK_TOKENFEPrivate-mode token handling request (↔ TOKEN_VALIDATION_CHECK)NONE
CHECK_TURNSTILEFEBot-protection (Turnstile) verification request (↔ TURNSTILE_TOKEN_CHECK)NONE
CHECK_IP_RISKFEIP risk verification request (↔ IP_RISK_CHECK)NONE
CHECK_RATE_LIMITFESubmission frequency limit verification request (↔ RATE_LIMIT_CHECK)NONE
CHECK_FINGERPRINT_DUPLICATIONFEDevice fingerprint duplication verification request (↔ FINGERPRINT_CHECK)NONE
POST_DEVICE_VALIDATIONFEDevice verification result transmission (↔ DEVICE_VALIDATION_RECORDED)NONE
CHECK_APPROVEDFEApproval and duplicate-history check requestNONE
SEND_AUXID_SMSFESMS verification code send request (↔ AUXID_PHONE_VERIFICATION_STARTED)NONE
VERIFY_AUXID_SMSFESMS verification code verification request (↔ AUXID_PHONE_VERIFICATION_COMPLETED)NONE
KB_STAGE2_SEND_SMSFEKnowledge-Base verification SMS send requestNONE
KB_STAGE2_VERIFY_SMSFEKnowledge-Base verification SMS verification requestNONE
API_CALLFEGeneral API call not classified into the above itemsNONE

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Screen · environment observation (FE)

EventSourceMeaningUser impact
ALERT_SHOWNFENotification popup shownNONE
API_ERRORFEAPI request failure observed on the screenBLOCKED
JS_ERRORFEGlobal JS runtime errorNONE
PAGE_HIDDENFETab switched to the background (drop-off signal)NONE
PAGE_VISIBLEFETab returned to the foregroundNONE
NETWORK_ONLINEFENetwork returned onlineNONE
NETWORK_OFFLINEFENetwork switched offlineNONE
ERROR_PAGE_VIEWEDFEError page entered (forced drop-off point)BLOCKED
WEBSOCKET_CONNECTEDFEResult-receiving WebSocket connected successfullyNONE
WEBSOCKET_DISCONNECTEDFEResult-receiving WebSocket terminated abnormally → fell back to pollingNONE
WEBSOCKET_ERRORFEResult-receiving WebSocket error occurredNONE

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Camera · capture (FE)

EventSourceMeaningUser impact
CAMERA_REQUESTEDFECamera permission request startedNONE
CAMERA_ACTIVATEDFECamera stream activatedNONE
CAMERA_PERMISSION_DENIEDFEUser denied camera permission → capture not possibleBLOCKED
CAMERA_ERRORFECamera failed to start for a reason other than permissionBLOCKED
TIP_DIALOG_SHOWNFEID capture tips / recapture guidance shownNONE
ID_DOCUMENT_RETRYFEUser recaptured the ID documentRETAKE
UPLOAD_IMAGEFEID document / face image uploadNONE

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Auxiliary authentication (SMS · email · address · account)

EventSourceMeaningUser impact
AUXID_PHONE_VERIFICATION_STARTEDBESMS verification code sentNONE
AUXID_PHONE_VERIFICATION_COMPLETEDBESMS verification code verifiedCOMPLETED
VERIFY_EMAILFEEmail verification code verificationNONE
SEARCH_ADDRESSFEAddress autocomplete lookupNONE
GET_ADDRESS_DETAILFEDetail lookup of the selected addressNONE
VERIFY_ACCOUNTFEAccount verification (1-won transfer, etc.)NONE

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STEP1 — ID document

EventSourceMeaningUser impact
STEP1_ENTEREDBEStep1 (ID document) enteredNONE
REGIONAL_VALIDATIONBEConsistency check between IP country ↔ issuing countryBLOCKED
DUPLICATE_SUBMISSION_PERIOD_CHECKBEDuplicate check for the same email/IP within a periodBLOCKED
ID_RECOGNITIONBEID document OCR recognitionRETAKE
ID_LIVENESS_VERIFICATIONBEID document liveness (non-physical) verificationRETAKE
RECOGNITION_SCORE_EVALUATIONBERecognition score threshold evaluationRETAKE
AGE_VERIFICATIONBEAge extraction and verification (common to Step1/Step2)RETAKE
MRZ_VALIDATIONBEPassport MRZ validationRETAKE
BARCODE_VALIDATIONBEPDF417 barcode validationRETAKE
BLACKLIST_COUNTRY_EVALUATIONBEIssuing-country blocklist consistency checkBLOCKED
EXPIRED_ID_CHECKBEID document expiration date checkRETAKE
SUBMISSION_CREATEDBE★ Submission created — the core point of Step1NONE
STEP1_COMPLETEDBEStep1 completed successfully (Step2 entry possible)COMPLETED
SUBMIT_STEP1FEID document submission (observed on screen)NONE
STEP1_RESULTFEStep1 result received (pass / recapture / fail)NONE

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Pre-STEP2 (account verification)

EventSourceMeaningUser impact
VALIDATION_ACCOUNT_ENTEREDBEPre-STEP2 stage enteredNONE
TRANSFER_FREQUENCY_LIMIT_CHECKBEDaily transfer limit checkREJECTED
BANK_OCCUPANCY_REQUESTBE1-won occupancy code transfer requestRETAKE
BANK_NAMECHECK_REQUESTBEAccount holder name lookupRETAKE
PRE_STEP2_COMPLETEDBEPre-STEP2 verification passedCOMPLETED

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STEP2 — selfie · face

EventSourceMeaningUser impact
STEP2_ENTEREDBEStep2 (selfie) enteredNONE
PII_DUPLICATE_PERIOD_CHECKBEDuplicate check for the same personal information within a periodREJECTED
ACTIVE_LIVENESS_VERIFICATIONBEActive liveness verificationRETAKE
LIVENESS_VERIFICATIONBEPassive liveness verificationRETAKE
FACE_COMPAREBESelfie ↔ ID document face comparisonRETAKE
SELFIE_DUPLICATE_CHECKBESelfie (face) duplication checkREJECTED
CODEF_VERIFICATIONBEKorean government authenticity check (CODEF)RETAKE
MEX_CURP_VERIFICATIONBEMexico CURP verificationRETAKE
BANK_AUTHENTICATIONBE1-won occupancy code verification (Step2)RETAKE
EXPIRY_DATE_OF_STAY_CHECKBEStay expiration date checkRETAKE
COUNTRY_CODE_MATCH_CHECKBEConsistency check across 4 country codesPENDING
CUSTOM_POLICY_EVALUATIONBECustom policy evaluation and applicationNONE
DUPLICATE_APPROVED_USER_CHECKBEDuplicate check for approved usersREJECTED
AML_CHECKBEAML / sanctions-list check (asynchronous)NONE
FACE_COLLECTION_ADDBERegistration into the approved-face collectionNONE
ADDRESS_COLLECTIONBEAddress information collectionNONE
CREATE_LIVENESS_SESSIONFELiveness session creationNONE
GET_LIVENESS_RESULTFELiveness result lookupNONE
SUBMIT_STEP2FEFace submission (observed on screen)NONE
STEP2_RESULTFEStep2 result receivedNONE

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Face Auth (add-on)

EventSourceMeaningUser impact
GET_FACEAUTH_PRELOADFEFace Auth configuration / status preloadNONE
SUBMIT_FACEAUTHFEFace Auth main authenticationNONE

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Knowledge-Base verification

EventSourceMeaningUser impact
KB_STAGE1_INITFEKnowledge-Base verification stage 1 initializationNONE
KB_STAGE3_VERIFY_IDENTITYFEKnowledge-Base identity verification (stage 3)NONE
KB_STAGE4_VERIFY_FACEFEKnowledge-Base face verification (stage 4)NONE

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Final decision · notification

EventSourceMeaningUser impact
PENDINGBE★ Final hold confirmed (reason distinguished by reason)PENDING
REJECTEDBE★ Final rejection confirmed (reason distinguished by reason)REJECTED
APPROVEDBE★ Final approval confirmedAPPROVED
STEP2_COMPLETEDBEStep2 completed successfully (main flow ends)COMPLETED
KYC_RESULT_WEBHOOK_SENTBEKYC result webhook sentNONE
KYC_RESULT_EMAIL_SENTBEKYC result email sentNONE

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Post-process

EventSourceMeaningUser impact
INJECT_VALIDATIONFEAddress verification result injected (addveri separate entry)APPROVED
FINAL_PAGE_VIEWFEFinal result page entered (journey ends)COMPLETED

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Final decision reasons

Use the reason value of the final decision events (REJECTED · PENDING) to determine the exact reason.

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Rejection (REJECTED) reasons

reasonStageMeaning
RETRY_EXHAUSTEDSTEP1 / STEP2 / Pre-STEP2The same verification failed repeatedly, exceeding the retry limit
AGE_VERIFICATIONSTEP1 / STEP2Age verification failed
AGE_LIMITSTEP2Policy age restriction not met
BLACKLIST_COUNTRYSTEP2The issuing country is a blocked (blocklisted) country
INVALID_ACCEPTED_IDSTEP2Disallowed ID document type / issuing country
PII_DUPLICATESTEP2Duplicate submission of the same personal information (within the policy period)
SELFIE_DUPLICATESTEP2Duplicate of the same selfie (face)
SUPERSEDED_PASSPORTSTEP2Voided / reissued passport
DUPLICATE_USERSTEP2Duplicate of an already-approved same user
CUSTOM_POLICYSTEP2Rejection by a custom policy
AUTOMATIC_VERIFICATIONSTEP2Rejection by an automatic verification policy
BANK_TRANSFER_LIMITPre-STEP2Account transfer frequency limit exceeded
REGIONAL_VALIDATIONSTEP1Mismatch between IP country and issuing country
ID_IMAGE_INVALIDKnowledge-BaseID document image quality / validity not met
ID_INFO_MISMATCHKnowledge-BaseID document information mismatch
FACE_NOT_DETECTEDKnowledge-BaseFace not detected
LIVENESS_FAILKnowledge-BaseLiveness failed

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Hold (PENDING) reasons

reasonStageMeaning
COUNTRY_MISMATCHSTEP2Held for manual review due to a country code mismatch
FACE_AGENT_REVIEWSTEP2Manual (agent) face review required
ADDRESS_COLLECTIONSTEP2Additional address image collection required
CUSTOM_POLICYSTEP2Hold by a custom policy
ARGOS_SCORE_BELOW_THRESHOLDSTEP2ARGOS Score below the threshold
For the mapping between rejection/hold reasons and the error codes / error pages shown to the user, also see the Error codes and pages document.