On October 4th, 1944, the US Navy received a shipment of Philippine notes from the 1941 series. 5000 packets, each containing- (4) 10 Peso notes, (4) 5 Peso notes, and (40) 1 Peso notes, were given to pilots that were to fly missions over the occupied Philippine Islands. This was for use by the pilots if they were shot down over enemy territory, so that the Japanese military would not know that they were US pilots.
The notes can be identified by the serial numbers, as follows:
| Denomination (Pesos) | Serial Number Range | Number issued |
| 1 | E6324001E-E6524000E | 200,000 |
| 5 | E1328001E-E1348000E | 20,000 |
| 10 | E870001E-E890000E | 20,000 |
