Gardaí say they remain committed to finding out what happened to Annie McCarrick.
It marks 31 years since she vanished without trace at the age of 26.
Ms McCarrick, who was originally from New York, was last seen shopping for food in Quinnsworth on the Sandymount Road in Dublin.
On the 31st anniversary of her disappearance, gardaí have published her receipt of that trip which was found in her apartment.
Ms McCarrick had moved permanently to Ireland from New York in January 1993. She moved into rental accommodation in Sandymount, in St Catherine's Court, and began working as a waitress at the Courtyard Restaurant in Donnybrook.
Last year her disappearance was upgraded to a murder inquiry and it's understood two men have been investigated.
It's also now believed she didn't visit Johnny Foxes on the day she disappeared as first thought.
While widely circulated CCTV footage of her visiting an AIB on the day she disappeared was actually 11 days old.
Ms McCarrick is described as 5'8" in height, 10 stone, with long brown hair. She spoke with a soft Irish-American accent. When Ms McCarrick disappeared it is believed she was in possession of a large brown leather bag.
Annie was an only child - her dad died not knowing what happened to her while her 80 year old mother is still hoping for answers.
Gardaí are renewing their appeal to the public for any information that may shed light on Annie's disappearance and murder.
Anyone who may have interacted with Annie on or after March 26th 1993, is urged to contact gardaí.
