Okla. Stat. tit. 12, § 12-1339: Return - Signature and verification - Contents -

Production of party.

The return must be signed and verified by the person making it,

who shall state:

First. The authority or cause of restraint of the party in his

custody.

Second. If the authority be in writing, he shall return a copy

and produce the original on the hearing.

Third. If he has had the party in his custody or under his

restraint, and has transferred him to another, he shall state to

whom, the time, place and cause of the transfer.

He shall produce the party on the hearing, unless prevented by

sickness or infirmity, which must be shown in the return.