diff --git a/core/libs/prx/libSceNpAuth/CMakeLists.txt b/core/libs/prx/libSceNpAuth/CMakeLists.txt
new file mode 100644
index 000000000..ce6ce6a2f
--- /dev/null
+++ b/core/libs/prx/libSceNpAuth/CMakeLists.txt
@@ -0,0 +1,14 @@
+add_library(libSceNpAuth SHARED EXCLUDE_FROM_ALL Export.cpp)
+target_include_directories(libSceNpAuth PRIVATE ${LIBS_INCLUDE_DIR})
+configure_windows_unwind(libSceNpAuth)
+
+if(BUILD_TESTING)
+    add_test_executable(guest_np_auth_authorized_app_code_tests ${LIBS_INCLUDE_DIR}/tests/GuestNpAuthAuthorizedAppCode.cpp)
+    target_include_directories(guest_np_auth_authorized_app_code_tests PRIVATE ${LIBS_INCLUDE_DIR})
+    target_link_libraries(guest_np_auth_authorized_app_code_tests PRIVATE libSceNpAuth)
+    add_test(NAME guest_np_auth_authorized_app_code COMMAND guest_np_auth_authorized_app_code_tests)
+    if(WIN32)
+        set_tests_properties(guest_np_auth_authorized_app_code PROPERTIES ENVIRONMENT_MODIFICATION
+            "PATH=path_list_prepend:$<TARGET_FILE_DIR:libSceNpAuth>")
+    endif()
+endif()
diff --git a/core/libs/prx/libSceNpAuth/Export.cpp b/core/libs/prx/libSceNpAuth/Export.cpp
index 0cc41fcd2..21e28519a 100644
--- a/core/libs/prx/libSceNpAuth/Export.cpp
+++ b/core/libs/prx/libSceNpAuth/Export.cpp
@@ -61,8 +61,7 @@ int APS5_VABI sceNpAuthDeleteRequest(int req_id) {
 }
 
 int APS5_VABI sceNpAuthGetAuthorizedAppCode() {
- NotImplemented_nid_no_patch(__func__);
- return 0;
+ return SCE_NP_ERROR_SIGNED_OUT;
 }
 
 int APS5_VABI sceNpAuthGetAuthorizationCodeV3(int req_id, const void* param, void* auth_code, int* issuer_id) {
diff --git a/core/libs/tests/GuestNpAuthAuthorizedAppCode.cpp b/core/libs/tests/GuestNpAuthAuthorizedAppCode.cpp
new file mode 100644
index 000000000..f6dfce0de
--- /dev/null
+++ b/core/libs/tests/GuestNpAuthAuthorizedAppCode.cpp
@@ -0,0 +1,13 @@
+#include "prx/libc/include/general/VabiMacros.hpp"
+#include <cstdlib>
+
+extern "C" {
+int APS5_VABI sceNpAuthGetAuthorizedAppCode();
+}
+
+int main() {
+    constexpr int kSignedOut = static_cast<int>(0x80550006);
+    if (sceNpAuthGetAuthorizedAppCode() != kSignedOut) std::abort();
+    if (sceNpAuthGetAuthorizedAppCode() != kSignedOut) std::abort();
+    return 0;
+}
diff --git a/docs/dev/debt/libSceNpAuth.md b/docs/dev/debt/libSceNpAuth.md
index a7d0e43b7..a4964a44d 100644
--- a/docs/dev/debt/libSceNpAuth.md
+++ b/docs/dev/debt/libSceNpAuth.md
@@ -2,5 +2,5 @@
 
 ### Unknown function info
 
-- [sceNpAuthGetAuthorizedAppCode](../../../core/libs/prx/libSceNpAuth/Export.cpp) (libSceNpAuth) - declared without parameters as a throwing stub; Minecraft (PPSA17221) imports it and fails to load without it. The request parameter and code output are not known, and there is no PSN sign-in for it to succeed against.
+- [sceNpAuthGetAuthorizedAppCode](../../../core/libs/prx/libSceNpAuth/Export.cpp) (libSceNpAuth) - declared without parameters and returns `SCE_NP_ERROR_SIGNED_OUT` without reading them, as there is no PSN sign-in; the request parameter and code output are not known. Minecraft (PPSA17221) imports it, fails to load without it, and after its sign-in dialog treats the signed-out code as offline play.
 - [sceNpAuthAbortRequest, sceNpAuthGetAuthorizationCodeV3, sceNpAuthGetIdTokenV3, sceNpAuthPollAsync, sceNpAuthWaitAsync](../../../core/libs/prx/libSceNpAuth/Export.cpp) (libSceNpAuth) - request tracking, `ORBIS_NP_AUTH_ERROR_REQUEST_NOT_FOUND` (0x80550306) on unknown request IDs, `ORBIS_NP_AUTH_ERROR_INVALID_ID` (0x80550307) on non-async or unprocessed requests in Poll/Wait, `ORBIS_NP_AUTH_ERROR_INVALID_ARGUMENT` (0x80550301) on null arguments and repeated calls on completed requests, and `ORBIS_NP_AUTH_ERROR_ABORTED` (0x80550304) after an abort follow [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/np/np_auth.cpp) (PS4); async requests return OK and defer `SCE_NP_ERROR_SIGNED_OUT` to `sceNpAuthPollAsync`/`sceNpAuthWaitAsync` while sync requests fail immediately; PlayStation Network is not contacted. The parameter `size` fields are not checked (`ORBIS_NP_AUTH_ERROR_INVALID_SIZE`, structure layouts unknown), the request table has no limit (`ORBIS_NP_AUTH_ERROR_REQUEST_MAX`), and console behavior on PS5 is unverified