(a) Service on all parties. On the same date a document is filed with the commission, a copy shall also be sent to each party or the party's authorized representative by hand-delivery; by regular, certified, or registered mail; by email, upon agreement of the parties; or by fax.
(b) Certificate of service. A person filing a document shall include a certificate of service that certifies compliance with this section.
  (1) A certificate of service shall be sufficient if it substantially complies with the following example: "Certificate of Service: I certify that on {date}, a true and correct copy of this {name of document} has been sent to {name of opposing party or authorized representative for the opposing party} by {specify method of delivery, e.g., email, regular mail, fax, certified mail.} {Signature}"
  (2) If a filing does not certify service, the commission may:
    (A) return the filing;
    (B) send a notice of noncompliance to all parties, stating the filing will not be considered until all parties have been served; or
    (C) send a copy of the filing to all parties.
(c) Presumed time of receipt of served documents. The following rebuttable presumptions shall apply regarding a party's receipt of documents served by another party:
  (1) If a document was hand-delivered to a party, the commission shall presume that the document was received on the date of filing at the commission.
  (2) If a document was served by courier-receipted overnight delivery, the commission shall presume that the document was received no later than the next business day after filing at the commission.
  (3) If a document was served by regular, certified, or registered mail, or non-overnight courier-receipted delivery, the commission shall presume that it was received no later than three days after mailing.
  (4) If a document was served by fax or email before 5:00 p.m. on a business day, the commission shall presume that the document was received on that day; otherwise, the commission shall presume that the document was received on the next business day.
(d) Burden on sender. The sender has the burden of proving date and time of service.

Source Note: The provisions of this §12.127 adopted to be effective August 7, 2018, 43 TexReg 5057