The Post Office has unveiled plans which could see two of the region's major branches moved into shops.
The Post Offices in Wisbech and in Basildon are among 70 nationwide which could be moved if a retail partner can be found. A period of public consultation would be held before a final decision is made.
Green Party campaigners are staging a protest in Norwich to highlight the recent closure of a post office.
The Post Office and Co-Op store in Larkman Lane closed on Monday.
The group is concerned that Post Office Limited are imposing start-up costs which would make it prohibitive for anyone to reopen the branch.
The protest takes place in Larkman Lane at 10am today. They hope to get Post Office chiefs to cancel the start-up costs.