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“Postcards” shall be produced with the kinds of paper and specifications publicly announced by Chunghwa Post.
The paper used should be smooth, without any projection.
A postcard can either have a horizontal or a vertical orientation.
Apart from Chunghwa Post, anyone, when printing postcards, shall follow the three requirements mentioned above as well as use only certain kinds of paper and adhere to other specifications as mandated by Chunghwa Post. Postcards published by anyone other than Chunghwa Post may not bear such expressions as “Postal Administration” in any language or bear postage stamp imprints or similar patterns.
When a postcard printed by someone other than Chunghwa Post does not meet the specifications or use the kind of paper mandated by Chunghwa Post, the letter postage rate shall apply.

If the surface of a postcard is not smooth because of any glued attachment or projecting part, the postcard shall be enclosed in an envelope and posted as a letter.
In the case of a piece of paper folded into something resembling a postcard, it shall be posted as a letter.

Letter sheets are categorized into domestic letter sheets and aerograms according to their destinations. Aerograms are used for international airmail and letter sheets are used for domestic mail.
Anyone with the approval of Chunghwa Post who, whether for private use or sale, prints aerograms and/or letter sheets in accordance with the requirements publicly announced by Chunghwa Post (regarding paper types, size, and specifications) should print their permit number and text at the appointed location.

If a letter sheet contains any extra objects, the Chinese wording for letter sheet on the cover should be crossed off and it should be posted as a letter instead.
If an aerogramme contains any extra objects and is therefore returned to the sender for collection of the difference in postage between an aerogramme and a letter, then the words for aerogramme on the cover, whether printed in Chinese or any other languages commonly used in international mail, should be crossed off and the item posted as an airmail letter instead. When it can not be returned to the sender, the words for aerogramme on the cover, whether printed in Chinese or any other languages commonly used in international mail, should be crossed off, and the item should be delivered by means of surface transportation.

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Domestic periodicals, when meeting the following requirements, may be registered with Chunghwa Post and posted as newspapers or magazines after approval:
1. Periodicals that report or comment on politics, economics, science, culture or other issues that relate to the public welfare.
2. Official bulletins or government policy promotion materials published by the government or advocacy groups.
The term “newspapers,” as mentioned in the preceding paragraph hereof, refers to periodicals issued daily or within every six days; magazines refer to periodicals that are issued at set intervals ranging from every seven days to every three months.
If a periodical as mentioned in the first paragraph hereof is concluded by Chunghwa Post to be a commercial advertisement or promotion, or to be a company’s promotion for its own business operations or a specific person, then the said periodical may not be posted as a newspaper or magazine.

Books mentioned in Subparagraph 5, Article 4 of the Act refer to bound printed matters other than newspapers, magazines and catalogues.
The catalogue mentioned in Subparagraph 5, Article 4 of the Act refers to documents printed in words, photos or pictures with more than 50% of the contents dedicated to the price, function, specifications and user instructions of goods or services.

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All materials that can be delivered, apart from contraband or mail items that do not meet the specifications publicly announced by Chunghwa Post, may be posted as parcels or packages.
Printed matters may be posted as parcels or packages.

Chunghwa Post is not liable for any claims regarding undeliverable parcels that perish while Chunghwa Post makes inquiries about what to do with them.
An undeliverable parcel should be disposed of in accordance with the regulations regarding undelivered mail if the sender instructs to abandon.

In the case that the contents of a parcel are found to be perishable while being handled by Chunghwa Post, Chunghwa Post may, for the benefit of the sender, sell the contents of the parcel at once without notifying the sender or going through any other procedures first. If the contents cannot be sold or are not saleable, Chunghwa Post may destroy the said parcel.
Any parcel that is sold or destroyed by Chunghwa Post should be photographed and/or any other appropriate evidence should also be kept for future reference.
Chunghwa Post shall notify the sender to collect the proceeds, after various fees have been deducted, for the sale of the above-mentioned parcel.

“Electronic mail” refers to mail that is sent via the Internet to the electronic post office by a sender who has an electronic mail account with the post office that is subsequently printed out as hard copy by the post office and delivered to the addressee.

At the time of mailing, all postage should be paid in full according to the mail item’s category; postage rates should be calculated in accordance with relevant rate charts. For bulk mailings, the sender may enjoy a discounted rate if all mail items have their zip codes written on the cover and have been presorted into different bundles based on their zip codes in accordance with regulations set out by Chunghwa Post.
Where special handling as stipulated in Chapter Three hereof is required, additional special handling fees shall apply.

A stamp is valid as proof of postage for delivery only after the date of issue.

Postage stamps or other postage paid symbols shall be neatly affixed on the cover of a mail item without overlapping; any postage stamps or other postage paid symbols that are totally or partially covered shall become invalid.

Mail items with postage stamps or other postage paid symbols that have been cut, pasted together, scratched, pasted over, or that were used and washed shall not be delivered.

Postage paid symbols printed on postcards, aerogrammes or letter sheets, or special envelopes shall become invalid once they are cut out.