### Symptom

This KBA explains the algorithm for Singapore NRIC/FIN validation.

*"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."*

### Environment

- Human Capital Management (HCM)
- SAP R/3
- SAP R/3 Enterprise 4.7
- SAP ERP Core Component
- SAP ERP
- SAP enhancement package for SAP ERP
- SAP enhancement package for SAP ERP, version for SAP HANA
- SAP SuccessFactors Employee Central

### Resolution

The structure of the Singapore NRIC/FIN number is one initial letter (S,T,F,G,M) followed by seven digits and one letter behind.

The last letter is obtained from the 7 digits using the modulus eleven method. The steps to obtain the last letter are as below:

- Multiply each digit in the NRIC/FIN number by its weight.
- Add together the above products.
- If the first digit is G or T, add 4 to the sum obtained. If the first digit is M, add 3 to the sum obtained.
- Divide the resulting sum by 11 to obtain the remainder.
- Subtract (remainder + 1) from 11 to obtain the check digit.
- Check the check digit against the table to obtain the last letter.

The following table shows the weight for each digit:

2 |
7 |
6 |
5 |
4 |
3 |
2 |

The following tables are used to check the check digit corresponding letter.

If the first digit is S or T:

Check Digit |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |

Last Letter |
A |
B |
C |
D |
E |
F |
G |
H |
I |
Z |
J |

If the first digit is G or F:

Check Digit |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |

Last Letter |
K |
L |
M |
N |
P |
Q |
R |
T |
U |
W |
X |

If the first digit is M:

Check Digit |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |

Last Letter |
K |
L |
J |
N |
P |
Q |
R |
T |
U |
W |
X |

Example: G 5872776 N

- Multuiply each digit by its weight gives: 5*2+8*7+7*6+2*5+7*4+7*3+6*2
- Sum gives: 179
- Add sum + 4 gives: 183
- 183 modulus 11 gives 7 as remainder.
- Check digit = 11 – (7+1) = 3
- Letter obtained is "N"

### See Also

Note: 2526001 - PA-PA-SG: ID Format Validation on IT0185

Note: 3111689 - LC: New M FIN Series To Be Introduced From 1 January 2022

Note: 3263463 - Validation on Last Digit of M Series FIN Number

KBA: 2698139 - IT0179, IT0185 or IT0186 does not validate an employee's NRIC number

### Keywords

National ID, NRIC, FIN, Singapore Validation, IT0185, IT0186, IT0179, RP_25_NRIC_CHK_DGT, 25ICT , KBA , PA-PA-SG , Singapore , LOD-SF-EC-PER-NAT , National ID - Config, Rules, RBP, UI , How To