Guides
API Keys

Reason Codes

Trust Score

Reason CodeDescription
CUCarrier call was unsuccessful
D1This phone number is listed on a public website with the contents of its text messages posted publicly to allow a user to bypass phone possession check controls.
D2The phone number was recently deactivated.
DRThe device date returned wasn’t obtained in real-time, there could be a more recent device change.
DST-Mobile customers only: mobile number has been identified as “Do Not Sell” by the carrier, and live data was not used for the Trust Score.
DVHigh device change velocity associated with the phone.
FFCall forwarding wasn’t enabled on the consumer’s phone. This feature isn’t turned on by default. Please contact your account representative to enable this reason code.
FOCall forwarding was enabled on the consumer’s phone. This feature isn’t turned on by default. Please contact your account representative to enable this reason code.
G1The transaction failed at least one authentication check as defined in the Global Fraud Policy.
G2The transaction failed at least one identification check as defined in the Global Fraud Policy.
G3The transaction failed at least one compliance check as defined in the Global Fraud Policy.
G4The transaction failed at least one risk check as defined in the Global Fraud Policy.
HVHigh velocity of change events associated with the phone.
LPDevice Change < 90 days OR SIM Change < 90 days OR Mobile Number Change < 90 days
LSDevice Change < 90 days OR SIM Change < 90 days
LTDevice Change < 90 days old
NDPhone number “network status” (Active/Deactivated/Suspended) information is not available from the carrier.
NMThe line type was not mobile.
NPNon-personal line.
PNThis indicates the phone number was not active.
PTThe phone number was in a ported state. Any number not on its original home carrier has a PT reason code. This is NOT indicative of a recent carrier port.
RLThe phone number was associated with a high-risk line type (Non-Fixed VoIP or Prepaid).
RNThe phone number was at a lower risk for fraud due to being listed as a mobile line on the Override Services Registry (OSR).
RRThe phone number was at a higher risk for fraud due to being listed as a non-mobile line on the Override Services Registry (OSR).
SAThe phone number is classified as a sub-account line.
SRThe SIM date returned was not obtained in real-time, there could be a more recent SIM change.
UCThis indicates there was insufficient data to calculate the Trust Score.

Identity

Reason CodeDescription
C22 identities that have OS or OV reason codes
C33 identities that have OS or OV reason codes
C44 identities that have OS or OV reason codes
C55 or more identities that have OS or OV reason codes
CACommon addresses appearing across many unrelated identities associated with the phone number. This may indicate an increased risk of fraudulent activity.
DVHigh device change velocity associated with the phone.
G1The transaction failed at least one authentication check as defined in the Global Fraud Policy.
G2The transaction failed at least one identification check as defined in the Global Fraud Policy.
G3The transaction failed at least one compliance check as defined in the Global Fraud Policy.
G4The transaction failed at least one risk check as defined in the Global Fraud Policy.
HVHigh velocity of change events associated with the phone.
KAOwnership tenure is between 8 and 14 days.
KBOwnership tenure is between 15 and 21 days.
KCOwnership tenure is between 22 and 30 days.
KDOwnership tenure is between 31 and 45 days.
KEOwnership tenure is between 46 and 60 days.
KFOwnership tenure is between 61 and 90 days.
KGOwnership tenure is between 91 and 120 days.
KHOwnership tenure is between 121 and 150 days.
KIOwnership tenure is between 151 and 180 days.
KJOwnership tenure is between 181 and 365 days.
KKOwnership tenure is between 366 and 730 days.
KLOwnership tenure is between 731 and 1095 days.
KMOwnership tenure is between 1096 and 1460 days.
KNOwnership tenure is between 1461 and 1825 days.
KOOwnership tenure is greater than 1826 days.
These codes are not enabled by default. Talk to a Prove representative to enable them.
LPIED < 90 days \
LSIED < 90 days \
LTIED < 90 days old
MMThe returned identity has a different name than the input name.
NDPhone number “network status” (Active/Deactivated/Suspended) information is not available from the carrier.
NONewer ownership (identity) was recently associated with the phone number.
ODThe ownership of the phone number was found before a disconnect date.
OLOwnership tenure is greater than 45 days.
OOInput identity was verified (verified=true). The connection of the ownership or association to this phone number was not recent. However, no known newer ownership or association was found. See also code NO.
OSThis indicates short ownership tenure, which is 8 to 45 days.
OUThis indicates ownership tenure was unknown, meaning the date attributes associated with the phone number were unavailable. Ownership tenure is how long the identity has been associated with a phone number, based on when the ownership was first seen. See also codes OL, OS, and OV.
OVOwnership tenure of less than seven days.
PNThis indicates the phone number was not active.
PTThe phone number was in a ported state. Any number not on its original home carrier has a PT reason code. This isn’t indicative of a recent carrier port.
R1The number of identities associated with the phone number exceeded the suggested limit. This could be a sign of a higher risk of fraudulent activity.
RLThe phone number was associated with a high-risk line type (Non-Fixed VoIP or Prepaid).
S1Synthetic identity reason code one: the identity matched has many unique SSNs. This can indicate a higher risk of the identity being synthetic.
S2Synthetic identity reason code two: the identity matched has many DOB records. This can indicate a higher risk of the identity being synthetic.
S3Synthetic identity reason code three: the identity matched has a high number of relatives with the same/similar name. This can indicate a higher risk of the identity being synthetic.
S4Synthetic identity reason code four: the identity matched has an SSN issued before either the submitted DOB or—if no DOB was submitted—the identity’s DOB. This can indicate a higher risk of the identity being synthetic.

Updated about 2 hours ago