General Information - LEISS (GPQ/GPR)
The GPQ transactions are down for maintenance. DHS has not been able to provide a time frame for when the service will be operational.
The Nlets General Person Query leverages the Law Enforcement Information Sharing Service (LEISS), the Department of Homeland Security (DHS) implementation of the LEISP Exchange Standard (LEXS), version 3.1.4. This is a guide to LEISS, its search criteria, search results, and detail results. The audience for this document includes business owners and end users, as well as technical staff responsible for implementation of LEISS or its client applications.
Nlets users search LEISS using the GPQ message key sent to the two-character endpoint "AX". Details of search criteria are below. Nlets will return a response in the form of a GPR message which will either contain a digest response from LEISS or text indicating no record was found. If a record was found, the response will include a DataItemID that is a pointer to the full LEISS record. Sending a second GPQ message through Nlets with the DataItemID will result in a GPR containing the full LEISS record.
Search Criteria and Responses
A search request of LEISS must contain either person information or address information, and each search may include only one type. The table below gives details of each type of search.
Options for Searching LEISS
Search Type
Query Parameters
Person Name Search:
A search by a person's name which may optionally include a middle name, date of birth, or a passport number.
Person Identifier Search:
A search of a type of person identifying number
Address Search:
Any combination of ONE OR MORE of the options below, with the Country being optional in all cases.
Retrieval Request:
After running a person or address search, searching by the returned DataItemID will return a full record.
Option 1:
First Name and Last Name (with optional Middle Name)
Option 2:
Date of Birth and First Name and Last Name (with optional Middle Name)
Option 3:
Passport Number and First Name and Last Name (with optional Middle Name)
Option 4:
Full Name (First Name and Last Name, or First Name and Middle Name and Last Name)
Option 1:
Social Security Number
Option 2:
Alien File Number
Option 1:
Street Number and Street Name (with optional Secondary Address, e.g. Apartment Number)
Option 2:
City
Option 3:
State
Option 4:
Postal Code
Option 1:
Search using the DataItemID returned from a previous search. Copy the DataItemID EXACTLY as it appears in a GPR message.