(a) a written request for disclosure in physical or electronic form;
(b) a copy of the trust instrument that includes consent to disclosure of the content of electronic communications to the trustee;
(c) a certification by the trustee, under penalty of perjury, that the trust exists and the trustee is a currently acting trustee of the trust; and
(d) if requested by the custodian:
(1) a number, username, address, or other unique subscriber or account identifier assigned by the custodian to identify the trust's account; or
(2) evidence linking the account to the trust.