Which BADI/Exits to use to do Validation on Customer before idoc creation in BD12 tcode

Hi Experts,

Please suggest me which BADI/Exits I can use for my below requirement.

Requirement - I need to do few validations such as, in tcode BD12, during customer creation/change, Account group, Sales org, partner functins should match the given scope otherwise no need to trigger that idoc

For this requirement, I can make use of badi IDOC_CREATION_CHECK, parameter CREATE_IDOC. but for getting the customer no. and other details, i am not getting which is the best badi/exits to use.

Please suggest,

Thanks,

Kavya M B