The Civil War economy catalyzed a shortage of United States coinage—gold and silver coins were hoarded given their intrinsic bullion value relative to irredeemable paper currency at the time. In late 1861, to help finance the Civil War, the U.S. government borrowed gold coin from New York City banks in exchange for Seven-thirties treasury notes and the New York banks sold them to the public for gold to repay the loan. In December 1861, the Trent Affair shook public confidence with the threat of war on a second front. The United States Department of the Treasury suspended specie payments and banks in New York City stopped redeeming paper money for gold and silver. In the absence of gold and silver coin, the premium for specie began to devalue paper currency. After the New York banks suspended specie payments (quickly followed by Boston and Philadelphia) the premium on gold rose from 1–3% over paper in early January 1862 to 9% over paper in June 1862, by which time one paper dollar was worth 91.69 cents in gold. This fueled currency speculation (e.g., redeeming banknotes for silver coin which was then sold at a premium as bullion), and created significant disruption across businesses and trade. Alternate methods of providing small change included the reintroduction of Spanish quarter dollars in Philadelphia, cutting dollar bills in quarters or halves, refusing to provide change (without charging a premium for providing silver coins), or the issuance of locally issued shinplasters (i.e., those issued by businesses or local municipalities), which was forbidden by law in many states.

Treasurer of the United States Francis E. Spinner has been credited with finding the solution to the shortage of coinage: he created postage currency (which led into the use of fractional currency). Postage (or postal) currency was the first of five issues of US Post Office fractional paper money printed in 5-cent, 10-cent, 25-cent, and 50-cent denominations and issued from August 21, 1862, through May 27, 1863. Spinner proposed using postage stamps, affixed to Treasury paper, with his signature on the bottom (see illustration below). Based on this initiative, Congress supported a temporary solution involving fractional currency and on July 17, 1862, President Lincoln signed the Postage Currency Bill into law. The intent, however, was not that stamps should be a circulating currency.

The design of the first issue (postage currency) was directly based on Spinner's original handmade examples. Some varieties even had a perforated stamp-like edge. While not considered a legal tender, postage currency could be exchanged for United States Notes in $5 lots and were receivable in payment of all dues to the United States, up to $5. Subsequent issues would no longer include images of stamps and were referred to as Fractional Currency. Despite the July 1862 legislation, postage stamps remained a form of currency until postage currency gained momentum in the spring of 1863. In 1863, Secretary Chase asked for a new fractional currency that was harder to counterfeit than the postage currency. The new fractional currency notes were different from the 1862 postage currency issues. They were more colorful with printing on the reverse, and several anti-counterfeiting measures were employed: experimental paper, adding surcharges, overprints, blue endpaper, silk fibers, and watermarks to name a few. Fractional currency shields which had single-sided specimens were sold to banks to provide a standard for comparison for detecting counterfeits. Postage and fractional currency remained in use until 1876, when Congress authorized the minting of fractional silver coins to redeem the outstanding fractional currency.

• Inspiration, model, and proof for the first issue (postage currency)
• 
  Spinner's initial signed design (photo)
• 
  Original model artwork
• 
  Working proof with pencil notations

Value	Series	Size	Fr. no.	Image	Portrait	Varieties
$0.05	First issue	65 × 43.5 mm	Fr.1231		Thomas Jefferson	1228 – Perforated; monogram 1229 – Perforated; no monogram 1230 – Straight; monogram 1231 – Straight; no monogram
$0.10	First issue	65 × 43.5 mm	Fr.1240		George Washington	1240 – Perforated; monogram 1241 – Perforated; no monogram 1242 – Straight; monogram 1243 – Straight; no monogram
$0.25	First issue	78 × 48 mm	Fr.1280		Thomas Jefferson	1279 – Perforated; monogram 1280 – Perforated; no monogram 1281 – Straight; monogram 1282 – Straight; no monogram
$0.50	First issue	78 × 48 mm	Fr.1312		George Washington	1310 – Perforated; monogram 1311 – Perforated; no monogram 1311a – Same, except 14 versus 12 perf/20 mm 1312 – Straight; monogram 1314 – Straight; no monogram
$0.05	Second issue	65.5 × 47 mm	Fr.1232		George Washington	1232 – No surcharge 1233 – Surcharge "18-63" 1234 – Surcharge "18-63" and "S" 1235 – Surcharge "18-63" and "R-1"; Fiber paper
$0.10	Second issue	65.5 × 47 mm	Fr.1246		George Washington	1244 – No surcharge 1245 – Surcharge "18-63” 1246 – Surcharge "18-63" and "S” 1247 – Surcharge "18-63" and "I” 1248 – Surcharge "0-63" 1249 – Surcharge "18-63” and "T-1"
$0.25	Second issue	65.5 × 47 mm	Fr.1284		George Washington	1283 – No surcharge. 1284 – Surcharge "18-63" 1285 – Surcharge "18-63" and "A" 1286 – Surcharge "18-63" and "S" 1287 – Unissued Friedberg number 1288 – Surcharge "18-63" and "2" 1289 – Surcharge "18-63" and "T-1"; fiber paper 1290 – Surcharge "18-63" and "T-2"; fiber paper
$0.50	Second issue	65.5 × 47 mm	Fr.1322		George Washington	1314 – No surcharge 1315 – Unissued Friedberg number 1316 – Surcharge "18-63" 1317 – Surcharge "18-63" and "A" 1318 – Surcharge "18-63" and "1" 1319 – Unissued Friedberg number 1320 – Surcharge "18-63" and "0-1"; fiber paper 1321 – Surcharge "18-63" and "R-2"; fiber paper 1322 – Surcharge "18-63" and "T-1"; fiber paper
$0.03	Third issue	66 × 40.5 mm	Fr.1226		George Washington	1226 – Portrait light background 1227 – Portrait dark background
$0.05	Third issue	64 × 46 mm	Fr.1238		Spencer Clark	1236 – Red reverse 1237 – Red reverse; design letter "a" 1238 – Green reverse 1239 – Green reverse; design letter "a"
$0.10	Third issue	81 × 47 mm	Fr.1254		George Washington	1251 – 1254 Red reverse 1251 – Red reverse 1252 – Red reverse; design numeral "1" 1253 – Red reverse; (AS) Colby and Spinner 1254 – Red reverse; (AS) Jeffries and Spinner 1255 – 1256 Green reverse 1255 – Green reverse 1255a – Green reverse; (AS) Colby and Spinner 1256 – Green reverse; design numeral "1"
$0.25	Third issue	95.5 × 47 mm	Fr.1294		William Fessenden	1291 – 1293 Red reverse 1291 – Red reverse 1292 – Red reverse; design letter "a" 1293 – Friedberg number removed from use 1294 – 1300 Green reverse 1294 – Green reverse 1295 – Green reverse; design letter "a" 1296 – Green reverse; large design letter "a" 1297 – Green reverse; surcharge "M-2-6-5"; fiber paper 1298 – Green reverse; same as 1297; design letter "a" 1299 – Green reverse; surcharge "M-2-6-5"; obverse ornamental designs in sold bronze overprint; fiber paper 1300 – Green reverse; same as 1299; design letter "a"
$0.50	Third issue	114 × 48 mm	Fr.1328		Francis Spinner	1324 – 1330 Red reverse; surcharge "A-2-6-5" 1324 – Red reverse; surcharge "A-2-6-5"; no design figures 1325 – Red reverse; surcharge "A-2-6-5"; design figures "1" and "a" 1326 – Red reverse; surcharge "A-2-6-5"; design figure "1" 1327 – Red reverse; surcharge "A-2-6-5"; design figure "a" 1328 – Red reverse; surcharge "A-2-6-5"; (AS) Colby and Spinner 1329 – Red reverse; surcharge "A-2-6-5"; (AS) Allison and Spinner 1330 – Red reverse; surcharge "A-2-6-5"; (AS) Allison and New 1331 – 1334 Green reverse; no surcharge 1331 – Green reverse; no surcharge; no design figures 1332 – Green reverse; no surcharge; design figures "1" and "a" 1333 – Green reverse; no surcharge; design figure "1" 1334 – Green reverse; no surcharge; design figure "a" 1335 – 1338 Green reverse; surcharge "A-2-6-5" 1335 – Green reverse; surcharge "A-2-6-5"; no design figures 1336 – Green reverse; surcharge "A-2-6-5"; design figures "1" and "a" 1337 – Green reverse; surcharge "A-2-6-5"; design figure "1" 1338 – Green reverse; surcharge "A-2-6-5"; design figure "a"
$0.50	Third issue	114 × 48 mm	Fr.1339		Francis Spinner	1339 – Green reverse; no surcharge or design figures 1340 – Green reverse; design figures "1” and "a" 1341 – Green reverse; design figure "1" 1342 – Green reverse; design figure "a"
$0.50	Third issue	114 × 48 mm	Fr.1355		Justice holding scales	1343 – 1346 Red reverse; no surcharge 1343 – Red reverse; no surcharge; no design figures 1344 – Red reverse; no surcharge; design figures "1" and "a" 1345 – Red reverse; no surcharge; design figure "1" 1346 – Red reverse; no surcharge; design figure "a" 1347 – 1350 Red reverse; surcharge "A-2-6-5" 1347 – Red reverse; surcharge "A-2-6-5"; no design figures 1348 – Red reverse; surcharge "A-2-6-5"; design figures "1" and "a" 1349 – Red reverse; surcharge "A-2-6-5"; design figure "1" 1350 – Red reverse; surcharge "A-2-6-5"; design figure "a" 1351 – 1354 Red reverse; surcharge "S-2-6-4"; (PS) 1351 – Red reverse; surcharge "S-2-6-4"; (PS); no design figures; fiber paper 1352 – Red reverse; surcharge "S-2-6-4"; (PS); design figures "1" and "a"; fiber paper In 2004, a Fr. 1352 (one of only three known), sold at public auction for $126,500. 1353 – Red reverse; surcharge "S-2-6-4"; (PS); design figure "1"; fiber paper 1354 – Red reverse; surcharge "S-2-6-4"; (PS); design figure "a"; fiber paper 1355 – 1357 Red reverse; (AS) Colby and Spinner 1355 – Red reverse; (AS) Colby and Spinner; no surcharge or design figures 1356 – Red reverse; (AS) Colby and Spinner; surcharge "A-2-6-5" 1357 – Red reverse; (AS) Colby and Spinner; surcharge "A-2-6-4"; fiber paper 1358 – 1361 Green reverse; no surcharge 1358 – Green reverse; no surcharge; no design figures 1359 – Green reverse; no surcharge; design figures "1" and "a" 1360 – Green reverse; no surcharge; design figure "1" 1361 – Green reverse; no surcharge; design figure "a" 1362 – 1365 Green reverse; surcharge "A-2-6-5" (narrow) 1362 – Green reverse; surcharge "A-2-6-5" (narrow); no design figures 1363 – Green reverse; surcharge "A-2-6-5" (narrow); design figures "1" and "a" 1364 – Green reverse; surcharge "A-2-6-5" (narrow); design figure "1" 1365 – Green reverse; surcharge "A-2-6-5" (narrow); design figure "a". *narrow – spacing of the surcharge 1366 – 1369 Green reverse; surcharge "A-2-6-5" (wide) 1366 – Green reverse; surcharge "A-2-6-5" (wide); no design figures 1367 – Green reverse; surcharge "A-2-6-5" (wide); design figures "1" and "a" 1368 – Green reverse; surcharge "A-2-6-5" (wide); design figure "1" 1369 – Green reverse; surcharge "A-2-6-5" (wide); design figure "a" *wide – spacing of the surcharge 1370 – 1373a Green reverse; surcharge "A-2-6-5"; fiber paper 1370 – Green reverse; surcharge "A-2-6-5"; fiber paper; no design figures 1371 – Green reverse; surcharge "A-2-6-5"; fiber paper; design figures "1" and "a" 1372 – Green reverse; surcharge "A-2-6-5"; fiber paper; design figure "1" 1373 – Green reverse; surcharge "A-2-6-5"; fiber paper; design figure "a" 1373a – Green reverse; surcharge "A-2-6-4"; fiber paper; (PS); no design figure
$0.10	Fourth issue	79 × 46 mm	Fr.1259		Bust of Liberty	1257 – Large red seal; watermarked; silk fibers (pink) 1258 – Large red seal; silk fibers (pink) 1259 – Large red seal; silk fibers (violet); blue end paper 1260 – Does not exist 1261 – Smaller red seal; silk fibers (violet); blue end paper
$0.15	Fourth issue	89 × 46 mm	Fr.1269		Bust of Columbia	1267 – Large red seal; watermarked; silk fibers (pink) 1268 – Large red seal; silk fibers (pink) 1269 – Large red seal; silk fibers (violet); blue end paper 1270 – Does not exist 1271 – Smaller red seal; silk fibers (violet); blue end paper
$0.25	Fourth issue	96.5 × 46 mm	Fr.1303		George Washington	1301 – Large red seal; watermarked; silk fibers (pink) 1302 – Large red seal; silk fibers (pink) 1303 – Large red seal; silk fibers (violet); blue end paper 1307 – Smaller red seal; silk fibers (violet); blue end paper
$0.50	Fourth issue	106 × 47 mm	Fr.1374		Abraham Lincoln	1374 – Large seal; watermarked; silk fibers (pink) 1375 – Delisted Friedberg number
$0.50	Fourth issue	103 × 46 mm	Fr.1376		Edwin Stanton	1376 – Small red seal; silk fibers (violet); blue end paper
$0.50	Fourth issue	95 × 52 mm	Fr.1379		Samuel Dexter	1379 - Green seal; silk fibers (light violet); blue end paper
$0.10	Fifth issue	81 × 51 mm	Fr.1265		William Meredith	1264 – Green seal 1265 – Red seal; long, thin key (in Treasury seal) 1266 – Red seal; short, thick key (in Treasury seal)
$0.25	Fifth issue	88.5 × 51.5 mm	Fr.1308		Robert Walker	1308 – Long, thin key (in Treasury seal) 1309 – Short, thick key (in Treasury seal)
$0.50	Fifth issue	109.5 × 53.5 mm	Fr.1381		William Crawford	1380 – Red seal; light pink paper on obverse; silk fibers 1381 – Red seal; blue end paper; silk fibers

Three people were depicted on fractional currency during their lifetime: Francis E. Spinner (Treasurer of the United States), William P. Fessenden (U.S. Senator and Secretary of the Treasury), and Spencer M. Clark (Superintendent of the National Currency Bureau). Both Spinner and Clark decided to have their portrait depicted on currency, which created controversy. Republican Representative Martin R. Thayer of Pennsylvania was an outspoken critic, suggesting that the Treasury's privilege of portrait selection for currency was being abused. On April 7, 1866, led by Thayer, Congress enacted legislation specifically stating "that no portrait or likeness of any living person hereafter engraved, shall be placed upon any of the bonds, securities, notes, fractional or postal currency of the United States." On the date of passage, a number of plates for the new 15-cent note depicting William Tecumseh Sherman and Ulysses S. Grant had been completed, as the plate proofs for these exist in the archives of the Smithsonian Institute's National Museum of American History. However, the plates were never used to produce notes for circulation. The only Sherman-Grant examples produced were single sided specimens that were placed on Fractional Currency Shields.

• Federal Reserve System
• List of people on United States banknotes
• Treasury Note (19th century)
• United States postal notes

• Lera, Thomas (2011). "In the National Postal Museum: Postage and Fractional Currency". Collectors Club Philatelist. 90 (4): 235–237.
• Wakeman, Abram (October 11, 1862). "The Postage Stamp Currency; Statement of City Postmaster Wakeman in Reference to Defaced Postage Stamps". New York Times. Archived from the original on September 21, 2013. Retrieved January 9, 2013.