International Standard Letters
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A letter that only contains paper media is deemed a standard letter. Letters, documents and postcards can be sent as standard letters. It’s important to ensure that the packaging and dimensions of a letter meet the standard requirements and that, most importantly, the letter is properly addressed.
Weight and dimensions:
Standard letters can be sent as regular mail, registered mail or insured mail.
Speed According to the postal service directive, European Union Member States are obligated to deliver 85% of priority deliveries to addressees within three days following the date of transfer to a postal institution, while 97% of the deliveries must be delivered within five days following the date of transfer to a postal institution.
Standard Terms and Conditions for Universal Postal Service |

