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Unique Candidate Identifiers

Introduction

Each candidate sitting GCE A/AS, GCSE Modular and Key Skills examinations will be allocated a Unique Candidate Identifier (UCI) number, which will be used to identify individuals during their modular courses.

Modular 'cash-in' entries often include results from more than one examinations session. It is necessary to be able to track individual candidates' module results to ensure that the correct 'cash-in' grade is awarded. Whereas a candidate number is only valid for a single session, a UCI will remain with individuals for the duration of their GCE courses, even if the candidate moves to a different centre.

UCIs are also required for Key Skills and the new GCSE Modular specifications.

UCI structure

The UCI is a 13-character code made up as follows-

68199 0 01 2058 G

Digits 1-5 the centre number where the candidate enters his / her first unit
Digit 6 Board identifier (0 in all cases for WJEC entries)
Digits 7-8 year in which the UCI is generated
Digits 9-12 the four digit candidate examination number
Digit 13 Check digit calculated / allocated automatically

Online check digit generator

This programme will calculate the check digit for a given UCI.

Centre Number UAB identifier
(always 0)
Year of Registration Candidate Number Check Character




Calculating the check digit

The check digit is calculated from the first twelve digits as follows:

Digit ID ID1 ID2 ID3 ID4 ID5 ID6 ID7 ID8 ID9 ID10 ID11 ID12 check
Digit value 6 8 9 9 9 0 9 8 0 0 0 1 ?
Multiply by 16 15 14 13 12 11 10 9 8 7 6 5  

ID1 is multiplied by 16, ID2 is multiplied by 15, ID3 by 14 etc, and the sum of the products calculated.

So for UCI 689990980001
(6×16) + (8×15) + (9×14) + (9×13) + (9×12) + (0×11) + (9×10) + (8×9) + (0×8) + (0×7) + (0×6) + (5×5) = 734

The sum of the products is then divided by 17, and the remainder calculated.

734÷17 = 43; remainder = 3

The letter corresponding to the value of the remainder in the table below is the check digit

Remainder 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Check Digit A B C D E F G H K L M R T V W X Y

For the example above, the check digit is D
The complete UCI is therefore 689990980001D