檢查數字，使從一個單一的數據串在輸入數據時的路由目標和帳戶號碼發送銀行（或客戶）進行完整性檢查。此檢查是保證檢測到在某一字符被忽略、重複、打錯或兩個字符被調換時能夠發現。因此，路由和帳號錯誤幾乎不會同時發生。

IBAN以電子方式傳送時不能包含空格，而印在紙上的IBAN以一組四個字分隔，最後一組長度不固定，如下面的例子所示：

國家

IBAN 格式例子

希臘

GR16 0110 1250 0000 0001 2300 695

英國

GB29 NWBK 6016 1331 9268 19

沙特阿拉伯

SA03 8000 0000 6080 1016 7519

瑞士

CH93 0076 2011 6238 5295 7

以色列

IL62 0108 0000 0009 9999 999

性質

编辑

偵錯

编辑

透過取模，以下常見錯誤可被偵測到：

任何單一置換錯誤(一數字遭替代，如 4234 變 1234)

任何或將近任何單一傳送錯誤 (相鄰或間隔一位的兩數字位置交換，如 12354 與 12543 與 12345).

有鑒於國際銀行帳戶號碼使用「取模-97」，前述錯誤都會被偵測到。

任何或將近任何移動錯誤 （整個字串向右或向左移動）

以相當高的比率偵測出雙置換錯誤(兩個單一置換錯誤。如 7234587 與 1234567)

高比例的其他錯誤

各國 IBAN格式

编辑

此表格簡述各國之IBAN的格式：[1]

於ISO兩位國家代碼之後的 kk 表示由IBAN其他字母計算而得的校對碼。假如目前有疑慮，將於 Comments 列中指出。此狀況存在於當 BBAN 之校對碼使用和 IBAN校對碼一樣的演算法。

BBAN列為IBAN中之BBAN部分的格式。大寫字母 (A–Z) 以 "a"表示，數字 (0–9) 以 "n" 表示，不分大小寫文數字 (a–z, A–Z, 0–9) 以 “c"。例如，保加利亞 BBAN (4a,6n,8c) 包含 4 大寫字母，接著為6數字，再來為 8 不分大小寫文數字。

將引入IBAN的國家列於 italics， 預計引入時間 ‘’'加粗。

國家

字母

BBAN 格式

IBAN 域

Comment

阿爾巴尼亞

28

8n, 16c

ALkk bbbs sssx cccc cccc cccc cccc

b = National bank code s = Branch code x = National check digitc = Account number

安道爾

24

8n,12c

ADkk bbbb ssss cccc cccc cccc

b = National bank code s = Branch code c = Account number

奧地利

20

16n

ATkk bbbb bccc cccc cccc

b = National bank code c = Account number

亞塞拜然

28

4c,20n

AZkk bbbb cccc cccc cccc cccc cccc

b = National bank code c = Account number

巴林

22

4a,14c

BHkk bbbb cccc cccc cccc cc

b = National bank codec = Account number

比利時

16

12n

BEkk bbbc cccc ccxx

b = National bank code c = Account number x = National check digits

波斯尼亞和黑塞哥維納

20

16n

BAkk bbbs sscc cccc ccxx

k = IBAN check digits (always 39) b = National bank code s = Branch code c = Account number x = National check digits

巴西

29

23n, 1a, 1c

BRkk bbbb bbbb ssss sccc cccc ccct n

k = IBAN check digits (Calculated by MOD 97-10) b = National bank code s = Branch code c = Account numbert = Account type (Cheque account, Savings account etc.)n = Owner account number ("1", "2" etc.)[2]

保加利亞

22

4a,6n,8c

BGkk bbbb ssss ddcc cccc cc

b = BIC bank code s = Branch (BAE) number d = Account type c = Account number

哥斯大黎加

21

17n

CRkk bbbc cccc cccc cccc c

b = bank code c = Account number

克羅埃西亞

21

17n

HRkk bbbb bbbc cccc cccc c

b = Bank code c = Account number

賽普勒斯

28

8n,16c

CYkk bbbs ssss cccc cccc cccc cccc

b = National bank code s = Branch code c = Account number

捷克

24

20n

CZkk bbbb ssss sscc cccc cccc

b = National bank code s = Account number prefix c = Account number

丹麥

18

14n

DKkk bbbb cccc cccc cc

b = National bank code c = Account number

多明尼加共和國

28

4a,20n

DOkk bbbb cccc cccc cccc cccc cccc

b = Bank identifier c = Account number

愛沙尼亞

20

16n

EEkk bbss cccc cccc cccx

b = National bank code s = Branch code c = Account number x = National check digit

法羅群島[Note 1]

18

14n

FOkk bbbb cccc cccc cx

b = National bank code c = Account number x = National check digit

芬蘭

18

14n

FIkk bbbb bbcc cccc cx

b = Bank and branch code c = Account number x = National check digit

法國[Note 2]

27

10n,11c,2n

FRkk bbbb bggg ggcc cccc cccc cxx

b = National bank code g = Branch code c = Account number x = National check digits

格魯吉亞

22

2c,16n

GEkk bbcc cccc cccc cccc cc

b = National bank code c = Account number

德國

22

18n

DEkk bbbb bbbb cccc cccc cc

b = Bank and branch identifier c = Account number

直布羅陀

23

4a,15c

GIkk bbbb cccc cccc cccc ccc

b = BIC bank code c = Account number

希臘

27

7n,16c

GRkk bbbs sssc cccc cccc cccc ccc

b = National bank code s = Branch code c = Account number

格陵蘭[Note 1]

18

14n

GLkk bbbb cccc cccc cc

b = National bank code c = Account number

瓜地馬拉 [3]

28

4c,20c

GTkk bbbb mmtt cccc cccc cccc cccc

b = National bank code c = Account number m = Currency t = Account type

匈牙利

28

24n

HUkk bbbs sssk cccc cccc cccc cccx

b = National bank code s = Branch code c = Account number x = National check digit

冰島

26

22n

ISkk bbbb sscc cccc iiii iiii ii

b = National bank code s = Branch code c = Account number i = holder's kennitala (national identification number).

愛爾蘭

22

4c,14n

IEkk aaaa bbbb bbcc cccc cc

a = BIC bank code b = Bank/branch code (sort code) c = Account number

以色列

23

19n

ILkk bbbn nncc cccc cccc ccc

b = National bank code n = Branch number c = Account number 13 digits (padded with zeros)

義大利

27

1a,10n,12c

ITkk xaaa aabb bbbc cccc cccc ccc

x = Check char (CIN) a = National bank code (Associazione bancaria italiana（義大利語：Associazione bancaria italiana） or Codice ABI ) b = Branch code (Coordinate bancarie（義大利語：Coordinate bancarie） or CAB – Codice d'Avviamento Bancario) c = Account number

約旦[4]

30

4a, 22n

JOkk bbbb nnnn cccc cccc cccc cccc cc

b = National bank code n = Branch code c = Account number

哈薩克

20

3n,13c

KZkk bbbc cccc cccc cccc

b = National bank code c = Account number

科索沃

20

4n,10n,2n

XKkk bbbb cccc cccc cccc

b = National bank code c = Account number

科威特

30

4a, 22c

KWkk bbbb cccc cccc cccc cccc cccc cc

b = National bank code c = Account number.

拉脫維亞

21

4a,13c

LVkk bbbb cccc cccc cccc c

b = BIC Bank code c = Account number

黎巴嫩

28

4n,20c

LBkk bbbb cccc cccc cccc cccc cccc

b = National bank code c = Account number

列支敦斯登

21

5n,12c

LIkk bbbb bccc cccc cccc c

b = National bank code c = Account number

立陶宛

20

16n

LTkk bbbb bccc cccc cccc

b = National bank code c = Account number

盧森堡

20

3n,13c

LUkk bbbc cccc cccc cccc

b = National bank code c = Account number

北馬其頓

19

3n,10c,2n

MKkk bbbc cccc cccc cxx

k = IBAN check digits (always = "07")b = National bank code c = Account number x = National check digits

馬爾他

31

4a,5n,18c

MTkk bbbb ssss sccc cccc cccc cccc ccc

b = BIC bank code s = Branch code c = Account number

茅利塔尼亞

27

23n

MRkk bbbb bsss sscc cccc cccc cxx

k = IBAN check digits (always 13)b = National bank code s = Branch code (code guichet) c = Account number x = National check digits (clé RIB（法语：clé RIB）)

毛里求斯

30

4a,19n,3a

MUkk bbbb bbss cccc cccc cccc cccc cc

b = National bank code s = Branch identifier c = Account number

摩納哥

27

10n,11c,2n

MCkk bbbb bsss sscc cccc cccc cxx

b = National bank code s = Branch code (code guichet) c = Account number x = National check digits (clé RIB（法语：clé RIB）).

摩爾多瓦

24

2c,18c

MDkk bbcc cccc cccc cccc cccc

b = National bank codec = Account number

蒙特內哥羅

22

18n

MEkk bbbc cccc cccc cccc xx

k = IBAN check digits (always = "25") b = Bank code c = Account number x = National check digits

荷蘭

18

4a,10n

NLkk bbbb cccc cccc cc

b = BIC Bank code c = Account number

挪威

15

11n

NOkk bbbb cccc ccx

b = National bank code c = Account number x = Modulo-11 national check digit

巴基斯坦

24

4c,16n

PKkk bbbb cccc cccc cccc cccc

b = National bank code c = Account number

巴勒斯坦

29

4c,21n

PSkk bbbb xxxx xxxx xccc cccc cccc c

b = National bank code c = Account numberx = Not specified

波蘭

28

24n

PLkk bbbs sssx cccc cccc cccc cccc

b = National bank code s = Branch code x = National check digit c = Account number,

葡萄牙

25

21n

PTkk bbbb ssss cccc cccc cccx x

k = IBAN check digits (always = "50") b = National bank code s = Branch code C = Account number x = National check digit

卡達

29

4a, 21c

QAkk bbbb cccc cccc cccc cccc cccc c

b = National bank code c = Account number[5]

羅馬尼亞

24

4a,16c

ROkk bbbb cccc cccc cccc cccc

b = BIC Bank code c = Branch code and account number (bank-specific format)

聖馬利諾

27

1a,10n,12c

SMkk xaaa aabb bbbc cccc cccc ccc

x = Check char (CIN) a = National bank code (Associazione bancaria italiana（義大利語：Associazione bancaria italiana） or Codice ABI) b = Branch code (Coordinate bancarie（義大利語：Coordinate bancarie） or CAB – Codice d'Avviamento Bancario) c = Account number

沙烏地阿拉伯

24

2n,18c

SAkk bbcc cccc cccc cccc cccc

b = National bank code c = Account number preceded by zeros, if required

賽爾維亞

22

18n

RSkk bbbc cccc cccc cccc xx

b = National bank code c = Account number x = Account check digits

斯洛伐克

24

20n

SKkk bbbb ssss sscc cccc cccc

b = National bank code s = Account number prefix c = Account number

斯洛維尼亞

19

15n

SIkk bbss sccc cccc cxx

k = IBAN check digits (always = "56") b = National bank code s = Branch code c = Account number x = National check digits

西班牙

24

20n

ESkk bbbb gggg xxcc cccc cccc

b = National bank code g = Branch code x = Check digits c = Account number

瑞典

24

20n

SEkk bbbc cccc cccc cccc cccx

b = National bank code c = Account number x = Checksum

瑞士

21

5n,12c

CHkk bbbb bccc cccc cccc c

b = National bank code c = Account number

突尼西亞

24

20n

TNkk bbss sccc cccc cccc cccc

k = IBAN check digits (always 59)b = National bank code s = Branch code c = Account number

土耳其

26

5n,17c

TRkk bbbb bxcc cccc cccc cccc cc

b = National bank code x = Reserved for future use (currently "0") c = Account number

阿拉伯聯合大公國

23

3n,16n

AEkk bbbc cccc cccc cccc ccc

b = National bank code c = Account number

英國[Note 3]

22

4a,14n

GBkk bbbb ssss sscc cccc cc

b = BIC bank code s = Bank and branch code (sort code) c = Account number

英屬維京群島

24

4c,16n

VGkk bbbb cccc cccc cccc cccc

b = National bank code c = Account number