Learn about insurance and extra services that are available when you send domestic mail and packages via the United States Postal Service®. China Post Register Mail is an economical and slow shipping service. Normally it will take about 2 to 4 weeks to arrive destination country from China. Mail Classes. The Postal Service does not consider either certified mail service or registered mail service to be classes of mail. They are both add-on. Registered Mail is a service offered to customers who require proof of mailing and/or proof of delivery. The service secures the signature of the addressee or the. USPS Registered Mail is used for high value Domestic mailpieces. This secure USPS service offers insurance up to $50,000. Registered Mail also provides tracking. Label for International Registered Mail ※ It is also possible to use the service without the label. SingPost is pioneering and leading in eCommerce logistics as well as providing innovative mail and logistics solutions in Singapore and the Asia Pacific, with. Non-Registered Mail Cost-effective, timely and convenient express service with full tracking information to Russia Registered mail is a mail service offered by postal services in many countries, which allows the sender proof of mailing via a mailing receipt and, upon request. Track your letters and parcels conveniently via Singapore Post’s. Get your mail delivered internationally with your preferred. Sending via Registered Article;.