diff --git a/client/src/wiegand_formats.c b/client/src/wiegand_formats.c
index d7818661c..d43e46964 100644
--- a/client/src/wiegand_formats.c
+++ b/client/src/wiegand_formats.c
@@ -770,6 +770,69 @@ static bool Unpack_H10302(wiegand_message_t *packed, wiegand_card_t *card) {
     return true;
 }
 
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+static bool Pack_P10003(wiegand_card_t *card, wiegand_message_t *packed, bool preamble) {
+    memset(packed, 0, sizeof(wiegand_message_t));
+
+    if (card->FacilityCode > 0x0000FFFF) return false; // Can't encode FC.
+    if (card->CardNumber > 0x0007FFFF) return false; // Can't encode CN.
+    if (card->IssueLevel > 0) return false; // Not used in this format
+    if (card->OEM > 0) return false; // Not used in this format
+
+    packed->Length = 37; // Set number of bits
+
+    set_linear_field(packed, card->FacilityCode, 2, 13);
+    set_linear_field(packed, card->CardNumber, 15, 18);
+
+    set_bit_by_position(packed, evenparity32(get_linear_field(packed, 1, 18)), 0);
+    set_bit_by_position(packed, oddparity32(get_linear_field(packed, 18, 18)), 36);
+    if (preamble)
+        return add_HID_header(packed);
+    return true;
+}
+
+static bool Unpack_P10003(wiegand_message_t *packed, wiegand_card_t *card) {
+    memset(card, 0, sizeof(wiegand_card_t));
+
+    if (packed->Length != 37) return false; // Wrong length? Stop here.
+
+    card->FacilityCode = get_linear_field(packed, 2, 13);
+    card->CardNumber = get_linear_field(packed, 15, 18);
+    card->ParityValid =
+        (get_bit_by_position(packed, 0) == evenparity32(get_linear_field(packed, 1, 18))) &&
+        (get_bit_by_position(packed, 36) == oddparity32(get_linear_field(packed, 18, 18)));
+    return true;
+}
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 static bool Pack_H10304(wiegand_card_t *card, wiegand_message_t *packed, bool preamble) {
     memset(packed, 0, sizeof(wiegand_message_t));