The number of postal votes a person can hand deliver is limited to their own plus no more than 5 for other electors.
Where the elector has been appointed as a postal proxy for another elector - handing in the postal proxy vote would count towards one of the 5 for other electors.
If a person hands in more than 5 postal ballot packs for other electors, all the postal votes (other than their own) will be rejected.
If there is reason to suspect a person has already handed in the maximum number of postal votes on any previous occasion at the election, any subsequent postal votes handed in will be rejected.