To make up for the expense of postage, you can place as many stamps as you like on a letter. So, if postage is 70p, you might insert 1 x 1st class stamps, 2 x 35p stamps, or, providing the envelope is large enough, 70 × 1p stamps, albeit an envelope so large would count as a large letter and would therefore cost PS1.06.
However, starting in 2009, the British Post Office stopped producing envelopes big enough to hold multiple small items. Instead, it began inserting letters horizontally into plastic sleeves called "flats." These are sold in packs of 20 at post offices and newsagents but can only hold 15 items per flat. The postage rate for flats is then reduced by 25 cents for each item placed inside them; so, placing two stamps would cost just 5c instead of 10c.
Also, don't forget about international mail. If you order something from the United States online and want to know how much it will cost, remember that the shipping price depends on where you live! There are different rates for countries all over the world. Before you finish checking out, look at the bottom of the page to see what your total would be. Then change some things around in your cart (like quantity) and see what effect that has on the final charge. That's how you find out what your total before taxes will be.
Finally, there's also an option to have your item delivered to a local address instead of yourself.
I propose using two first-class stamps. The cost of a first-class stamp is 70 pence. As a result, if you use two first-class stamps, you will pay PS 1.40 for postage, which is 5 pence more than necessary. (Prices are current as of May 2019.)
The post office offers a choice of four types of postal codes: alpha-numeric, four digits, alphanumeric with hyphens, and acronyms. You can choose the one that best fits your needs. For example, an alpha-numeric code includes all letters and numbers; therefore it is the most extensive code and the most useful one if you want to reach any address in the world. An acronymed code consists of only three letters: DPO. This code is used mainly for addresses within the United Kingdom and its territories. A four-digit code uses all of its numbers from 0000 to 9999. It is the most common type of postal code and can be used for addresses in almost every country.
You can also choose between signed and unsigned postcodes. If you select signed postcodes, then the post office will add the word "Poste Restante" ("Postal Drop") to your letter. On receipt of your letter, the recipient must contact the post office to find out what number to put on their letter box for future correspondence from you.
You can use UK stamps if you are shipping from within the UK. They are not valid for shipping anywhere else. When using stamps to pay for postage, the various stamp values may be added up to get the needed sum. A first-class stamp is currently worth 67p, while a second-class stamp is worth 58p. Envelopes are also used in combination with stamps.
Stamps can only be sent to other countries from London. The Royal Mail has offices around the world - including in New York, Chicago, Los Angeles, Sydney and Hong Kong - that will issue mailing permits for those countries who want to send mail there. Otherwise, all letters sent from outside the UK will require a standard postal rate. This applies even if you are sending items of low value such as magazines or books.
Postcards are cheaper to send than letters. The cost of sending a postcard is based on the weight of the card and the level of service required. If you are sending a single card, then the cheapest option is by email. For multiple cards or larger packages, post offices near you are the best place to find competitive rates.
Stamps can only be collected at post offices. There are some small independent post offices in major cities that accept stamps as payment but they are not recommended because they do not have access to many services that post offices located in more remote areas can offer. In fact, most of these small offices do not even have a lockable safe!