If the address or place of employment of the obligor changes, the obligor, within 10 days after moving to a new address or receiving the first earnings from a new employer, shall send the change of address or new place of employment to: (1) the court: (i) by certified mail, return receipt requested; or (ii) by filing in person at the court and obtaining proof of filing; and (2) (i) if the recipient receives the support payments, the recipient, by first–class mail; or (ii) if the support enforcement agency receives the support payments, the support enforcement agency: 1. by certified mail, return receipt requested; 2. if the agency’s website allows parents to update address and employment information, by entering the new address or place of employment on–line; 3. by filing in person at the agency and obtaining proof of filing; or 4. by telephone or electronic communication to the agency and obtaining proof of change.
Maryland Legal Code