antoineaugusti / moduluschecking Goto Github PK
View Code? Open in Web Editor NEWCheck that a UK bank account number is valid using the VocaLink UK specification
License: MIT License
Check that a UK bank account number is valid using the VocaLink UK specification
License: MIT License
Hi, I am leaving an issue on a few of the modulus checking libraries on Github as they all seem to have the same issue (including our implementation at Monzo Bank). While the Vocalink modulus checking requirements specifically call out that Santander is the only bank that has 9 digit account numbers we have noticed that in practice other banks may also use 9 digit account numbers.
Specifically Coventry Building Society has this information in their FAQ
We use 9 digit account numbers - simply remove the first digit when giving your account number
The best way we thought of handling this would be to specifically use the documented logic in the modulus checking requirements only for sort codes used by Santander. For other 9 digit account numbers we simply remove the leading digit.
Based on this page we have defined this range as
090000-091900
720000-729999
890000-892999
165710
I hope this information helps, let me know if you have any other questions!
Would be possible to check the validity of a bank account without a sortcode? (perhaps returning a confidence level)
The links has changed to https://www.vocalink.com/tools/modulus-checking/
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