Julia Holmes, who was found dead alongside her partner earlier this month, wrote to a solicitor firm asking that they be buried together weeks before their bodies were found, it has emerged.
The badly decomposed bodies of Thomas Ruttle, 56, and his 63-year-old partner, were discovered in an upstairs bedroom of the farmhouse house they shared at Boolaglass, Askeaton, Co Limerick on 18 May.
A rifle - one of two licensed firearms in the house - which was found in the bedroom had not been discharged and there was no sign of gunshot wounds to the bodies or any physical trauma.
Gardaí believe the couple may have died from deliberate carbon monoxide poisoning.
A post-mortem examination carried out by State Pathologist Marie Cassidy failed to establish the cause of the couple's death and it took several days to officially confirm the identities of the bodies such was the level of decomposition.
The results of toxicology tests are expected to take a further week.
A series of hand written notes found in the kitchen of the farmhouse have led detectives to believe their deaths were as a result of a joint suicide pact.
Ms Holmes was a convicted fraudster who used over 40 different aliases.
"If you find us don't revive us" - was one of the messages found among the 20 hand written notes, many of which were signed by the couple.
Also found among the letters was a request that the contents of the notes be read out at the couple's inquests.
The bodies were found by burglars who tried to break into the Co Limerick farmhouse.
It has now emerged that weeks before the bodies were discovered, Ms Holmes sent a letter claiming to be her last will and testament, signed by herself and Mr Ruttle, to a legal practice in Northern Ireland.
It is understood the letter was signed Julia Holmes, one of the many aliases used by the woman born Cecelia Julia McKitterick in Castlederg, Co Tyrone.
In the correspondence she requested to be buried alongside Mr Ruttle, whom she married in April 2011, despite never divorcing her two previous husbands.
The letter states that the couple be buried alongside each other in the Ruttle family plot.
It is understood an instruction on the will states that proceeds from the estate are to be distributed among local builders who worked on the renovations at the Ruttle family farmhouse previously owned by Tom's late mother Eileen.
Ms Rutttle led local builders to believe she was dying from cancer when they sought €70,000 for renovating the two-storey farmhouse in Boolaglass.
Sources have questioned whether the letter will have any legal standing given Ms Holmes signed it using one of her many different aliases.
The couple had not been seen in public together since March after television and newspaper reports of his wife's fraudulent activities began to emerge.
Investigating gardaí are satisfied there was communication between Mr Ruttle and another man in early April.
However, they are still trying to establish when Ms Holmes was last seen, and her social media activity and blog entries are being examined as part of the inquiry.
Detectives are also looking into claims that a woman was blocked from accessing a Twitter account used by Ms Holmes on 22 April.
Mr Ruttle was from a well known and highly respected family.
