Okla. Stat. tit. 15, § 15-377: Exoneration of surety generally

A surety is exonerated:

1. In like manner with a guarantor.

2. To the extent to which he is prejudiced by any act of the

creditor which would naturally prove injurious to the remedies of

the surety or inconsistent with his rights, or which lessens his

security; or,

3. To the extent to which he is prejudiced by an omission of

the creditor to do anything, when required by the surety, which it

is his duty to do.