Applications for membership must be made in writing to the party executive using the membership form. The party executive is empowered to accept or reject any application. Any membership, other than a founder member, shall be probationary for six months. Applications will only be accepted from UK residents who support the party's aims and who are not current or former members of any other organisation membership of which has been declared by the part executive as incompatible with membership of Hartlepool First.
If a member of Hartlepool First subsequently joins such an organisation, or if the member is found to be a member of such an organisation or acts in a way to undermine the reputation of Hartlepool First or to bring Hartlepool First into public disrepute then their membership of Hartlepool First may be revoked by the party executive.