It is extremely important that we are notified when an interest or property owner changes their address. Failure to do so can result in a suspension of revenue. Address changes must be received in writing and must include the signature of the mineral owner. Please send changes to SEM Operating Company LLC, Attention: Land Department. Include, as applicable, your old/new name, old/new address, and signature. Please include your social security number for verification. We must have a certified copy of your marriage certificate or divorce decree in order to confirm the change and to update our records.