Can i use 3 second class stamps for international mail

In the UK, the Royal Mail's standard international postage rates are based on the weight and size of the item, as well as the destination country.

As of 2022, the Royal Mail's standard international postage rates are as follows:

For international mail, you cannot use 2nd class stamps, as they are only valid for domestic mail within the UK. You will need to use 1st class stamps or purchase international postage stamps, which are specifically designed for sending mail abroad.

If you want to send a letter or parcel internationally, you can use the Royal Mail's online postage calculator to determine the correct postage cost based on the weight, size, and destination of your item.

Alternatively, you can visit a Royal Mail post office or use a postal counter at a newsagent or supermarket to purchase the correct postage for your international mail.