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You pick up new $20 bills for your store. Your transaction record shows you should receive $2,000 in twenties. While counting, you notice that the last two digits of the serial numbers on three bills in a row are 41, 42, and 44. Does the gap mean you got one bill fewer than you expected?
A skipped serial number does not tell you how many bills you received. To verify the amount, confirm the denomination, count the bills, and compare the total with your transaction record.
Why Can a Strap of New Bills Have Skipped Serial Numbers?
In a September 15, 2026 update, Federal Reserve Financial Services said $20 notes were among the denominations already being produced on modernized equipment, alongside $1, $2, and $5 notes. Straps produced on that equipment can contain gaps or numbers that are out of order. Both sequential and nonsequential straps can appear in currency orders during the transition. Availability varies with local inventories and distribution schedules.
In a new strap produced on traditional equipment, the last two digits of the first note's serial number are 01, and those of the last note are 00. Do not assume the same pattern applies to a nonsequential strap or to a stack of bills assembled for a withdrawal. Count the bills to verify the quantity.
The Fed's update explains why gaps can occur in general. It cannot tell you what happened to any particular number you did not see. These example digits are made up.
How to Check Whether You Received the Full Amount
A standard FedCash strap contains 100 bills of the same denomination. That is a packaging standard. To verify what you received, count the bills and check the expected total on your transaction record, along with any denomination breakdown the bank provided. The example here assumes you expected $2,000, all in $20 bills.
- Confirm the denomination. Check that each bill in the group is marked $20. If the payout includes several denominations, count each group, multiply its count by its face value, and add the subtotals.
- Count the bills. Keep the money from this transaction separate from the rest of your store's cash. Move counted bills to a separate pile so you can keep track.
- Compare the total with the record. For this all-$20 example, multiply the verified bill count by $20 and compare that amount with the expected $2,000.
| Number of $20 bills counted | Counted amount | Compared with $2,000 expected |
|---|---|---|
| 100 | $2,000 | Matches |
| 99 | $1,980 | $20 short |
If the total is $1,980, count again before mixing the bills with other cash. If the difference remains, keep the transaction record and ask the bank to help verify the amount. The $20 difference tells you what needs checking; it does not establish how the difference occurred. Our guide to cash-counting differences at the bank counter explains how to compare amounts, denomination breakdowns, and transaction records.
Does the Serial-Number Sequence Tell You Whether a Bill Is Genuine?
Neither a gap nor a run of consecutive numbers can establish whether a bill is genuine. If you have a separate concern about a note, check the security features for its denomination and design. The official $20 note guide shows the features to look for across different designs.
Three Checks to Keep Separate
- Serial numbers: A gap in the serial numbers does not tell you whether a bill is missing.
- Amount received: Confirm the denominations, count the bills, and compare the total with the transaction record.
- Authenticity: Check the security features for the specific denomination and design.