Every state is different, but I have copied this from our Texas State Probate code. I see that you are in Oklahoma and the laws may be different so you will want to check the state specific requirements.
36D. EXAMINATION OF DOCUMENT OR SAFE DEPOSIT BOX WITHOUT
COURT ORDER. (a) A person who possesses or controls a document
delivered by a decedent for safekeeping or who leases a safe deposit
box to a decedent may permit any of the following persons to examine
the document or the contents of the safe deposit box:
(1) the spouse of the decedent;
(2) a parent of the decedent;
(3) a descendant of the decedent who is at least 18 years
old; or
(4) a person named as executor of the decedent's estate in a
copy of a document that the person has and that appears to be a will
of the decedent.
(b) The examination shall be conducted in the presence of
the person who possesses or controls the document or who leases the
safe deposit box or, if the person is a corporation, an officer of
the corporation.
Added by Acts 1981, 67th Leg., 1st C.S., p. 193, ch. 17, art. 3, ยง
1, eff. Sept. 1, 1981.
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Define Success on your own terms, achieve it by your own rules, and build a life you are proud of. Anne Sweeney