in service/src/main/java/org/apache/fineract/cn/cheque/service/internal/service/ChequeService.java [50:55]
public boolean chequeExists(final Cheque cheque) {
final MICR micr = cheque.getMicr();
return this.chequeRepository.findByChequeNumberAndBranchSortCodeAndAccountNumber(
micr.getChequeNumber(), micr.getBranchSortCode(), micr.getAccountNumber()
).isPresent();
}