Serial Number
The serial number is an applicant-assigned tracking identifier on a COLA application, typically using a two-digit year prefix followed by up to four characters chosen by the company to organize and reference their own label submissions.
In Plain English
The serial number is a company's own internal tracking number for their COLA applications, separate from the TTB-assigned TTB ID. Companies use serial numbers to organize their portfolio of label submissions internally. The first two digits represent the calendar year, and the remaining characters are whatever the company chooses. A large spirits company might use serial numbers like 26-0001, 26-0002, and so on to track each submission in a given year. Smaller companies might use simpler schemes. This field is entirely for the applicant's benefit and does not affect how the TTB processes the application.
Technical Detail
The serial number field on TTB Form 5100.31 accepts up to six characters, with the convention of starting with a two-digit year. Unlike the TTB ID, serial numbers are not unique across the system since different companies may use the same numbering schemes. The field is required on the application form. Companies with large portfolios of labels often develop systematic serial number conventions to track applications across brands, product lines, and filing batches. The serial number appears on the approved COLA certificate alongside the TTB ID and can be used for internal cross-referencing between a company's product records and their TTB filing history.
Why It Matters
Serial numbers can provide insight into a company's filing volume and organizational sophistication. A company with serial numbers in the hundreds for a given year clearly manages a large label portfolio. Sequential serial number gaps might indicate withdrawn or rejected applications. For compliance teams managing large portfolios, serial numbers are essential for tracking which products have current approvals and which need renewal or updating.
Related Terms
Frequently Asked Questions
Do I get to choose my own serial number?
Yes. The serial number is entirely assigned by the applicant. The TTB does not dictate the format beyond the convention of using a two-digit year prefix. You can use any numbering system that works for your internal tracking needs.
Is the serial number the same as the TTB ID?
No. The TTB ID is assigned by the TTB and is unique across all applications. The serial number is assigned by the applicant and is used for their own internal tracking. Both appear on the approved COLA certificate.
Can two companies use the same serial number?
Yes. Serial numbers are only unique within a company's own filings. Different companies routinely use the same serial number schemes without any conflict, since each COLA is uniquely identified by its TTB ID.