You must address the outgoing envelope to the elector at the address they have asked for their ballot papers to be sent to and which is shown in the postal voters’ list or the proxy postal voters list.1
To preserve the secrecy of the ballot, you must provide two separate envelopes for returning the ballot paper and the postal voting statement:2
Envelope A – this is the envelope for the return of the ballot paper, which is to be marked with the letter A, the words amlen papur pleidleisio and ballot paper envelope and the number of the ballot paper.
Envelope B – this is the covering envelope for the return of the ballot paper envelope (envelope A) and the postal voting statement; it is to be marked with the letter B and the return address.
Envelopes for anonymous electors
Whenever you communicate with an anonymous elector you are required to send the communication in an envelope or other form of covering in such a way that does not disclose to any other person that the voter has an anonymous entry.
Postal ballot packs should, therefore, be sent to anonymously registered electors in a plain outgoing envelope. The envelope should include their name and correspondence address, but must not include their elector number or make any reference to the election or electoral register.3
Postage costs
Unless you are delivering postal votes by hand, you are required to pre-pay postage on the outgoing envelope addressed to the postal voter.4
You are also required to pre-pay postage on all return envelopes, except where postal votes have been sent to an address outside of the UK.5
You should, however, explore with Royal Mail and your printer what you can do to facilitate the timely return of completed postal ballot packs from outside the UK, including the potential for the inclusion of appropriate pre-paid postage for items being returned from overseas.
You could decide to use a different design of envelope for postal votes being sent to an address which is outside the UK. For example you could add a different colour flash. This may facilitate more efficient sorting, identification and prioritisation of overseas postal votes.
1. Paragraph 9(6), Schedule 2, The Senedd Cymru (Representation of the People) Order 2025 (SCO 2025)↩ Back to content at footnote 1