Mermaid Round Address Stamp Self Inking Mermaid Round Address Stamp Self Inking Customization Instructions: Approximately ONE hour after you order you will receive an automated email from us, please reply to that email stating your customization Custom Return Address Stamp is self inking. Impresssion can last for up to one thousand impressions before being reinked. Default color is BLACK unless otherwise stated in Customization. All orders are made to order. Most orders ship within 24 business hours of your customization being received.