A tokenless authorization of an electronic check between a payor and a payee using an electronic third party identicator and at least one payor bid biometric sample is described. The method comprises a payor registration step, wherein the payor registers with an electronic third party identicator at...http://www.google.es/patents/US6230148?utm_source=gb-gplus-sharePatente US6230148 - Tokenless biometric electric check transaction
