31 CFR §360.51

Subject to the conditions set out in this subpart, a request for reissue of bonds in coownership form must be signed by both coowners, except that a request solely to eliminate the name of one coowner may be signed by that coowner only. A bond registered in beneficiary form may be reissued upon the request of the owner, without the consent of the beneficiary. Fiscal Service forms are available for requesting reissue.