How do I become a member of SoPost? Katie 24 June 2019 12:40 Updated Follow We don't have memberships or a way to be informed of the free sample campaigns we are running. Related articles How do I find free sample offers? Who are SoPost? Why is my address not being accepted? How do I have my personal data removed from SoPost? What do I do if I haven’t received my free sample? Comments 0 comments Article is closed for comments.