Ohio Rev. Code § 2137.08: Disclosure of content of electronic communications of principal.

To the extent a power of attorney expressly grants an agent authority over the content of electronic communications sent or received by the principal and unless directed otherwise by the principal or the court, a custodian shall disclose to the agent the content if the agent gives the custodian all of the following:

(A) A written request for disclosure in physical or electronic form;

(B) A copy of the power of attorney expressly granting the agent authority over the content of electronic communications of the principal;

(C) A certification by the agent, under penalty of perjury, that the power of attorney is in effect;

(D) If requested by the custodian, either of the following:

(1) A number, username, address, or other unique subscriber or account identifier assigned by the custodian to identify the principal's account;

(2) Evidence linking the account to the principal.