The Passport Office investigated 849 cases of suspected passport fraud last year.
According to Freedom of Information figures released to Newstalk, 32 were passed on to Gardaí to look into further.
These new figures show the Passport Office investigated over 3,500 cases of suspected passport fraud in the space of three years.
There were 1,644 in 2019, 1,033 in 2020 and 849 last year.
Some 119 of these cases were referred on to the Gardaí for further investigation - including 32 last year.
Barrister Morgan Shelley says the crime has become more difficult to commit in recent years.
"Because the technology that's used to make modern Irish and European passports is so advanced, it's almost impossible to counterfeit a passport by making a completely fake passport.
"It's also very difficult to forge a passport by altering a genuine passport.
"Fraudsters are much more likely to use counterfeit photocopies of a passport - where they alter a photocopy when they're, say, opening a bank account or engaging in money laundering".
While 77 passports were cancelled due to fraud in 2019, with 22 in 2020 and 31 last year.