Effective - 28 Aug 1939
140.450. Cancellation and filing of certificate — proof of loss. — When conveyances are delivered for lands sold for taxes the certificates therefor shall be cancelled and filed away by the collector; and in case of the loss of any certificate, on being fully satisfied thereof by due proof, or upon the production of a certified copy thereof, the collector may execute and deliver the proper conveyance, and file such proof in his office.
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(RSMo 1939 § 11153)