The first of the two happened at Wauchope on May 27, when three men, armed with a samurai sword, wooden club and machete, entered a hotel on High Street.
The men jumping the counter, and assaulting two staff members.
The second robbery occurred at Krambach in the early hours of July 8, leaving a 27-year-old with minor injuries after four males broke into a service station on The Bucketts Way.
Police are now hoping to speak with three men, who are described as being of Aboriginal or Torres Straight Islander appearance and of a slim build.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000.