USPS ELECTRONIC POSTMARK

APPLYING ELECTRONIC DATE AND TIME AND DIGITAL SIGNATURE TO ELECTRONIC DOCUMENTS AND TRANSACTIONS TO VERIFY TIME AND DATE RECEIVED AND THAT DOCUMENTS AND TRANSACTIONS HAVE NOT BEEN ALTERED; VERIFYING THAT A DIGITAL DOCUMENT HAS NOT BEEN ALTERED SINCE A CERTAIN TIME AND DATE, STATING WHAT THAT DATE AND TIME IS, AND APPLYING A DIGITAL SIGNATURE TO DIGITAL DOCUMENTS