Okla. Stat. tit. 40, § 40-1-230: Notice given

NOTICE GIVEN. A. Notice shall be deemed given when the

Oklahoma Employment Security Commission notifies by one of the

following means:

1. Mail;

2. Email or fax to email; or

3. Upload to the agency digital portal.

There is a rebuttable presumption that notice has been given on

the date stated in the communication.

B. The Commission's preferred method of notification shall be

electronic delivery through the agency digital portal or email. If

claimants or employers wish to opt in to delivery by the agency

digital portal or email, they may notify the Commission by one of

the methods listed in subsection A of this section.