In February he was jailed in Tauranga District Court to a representative charge of using false documentation to obtain a benefit.
In the same court yesterday, Wati, 64, pleaded guilty to a charge of producing a visa at Auckland International Airport knowing it was obtained fraudulently.
Lawyer Jessica Rose pleaded guilty to the charge on her client's behalf as Wati had to be assisted in court by a Fijian-Hindi speaking family member.
The summary of facts also revealed that in 1989, following the dissolution of Wati's marriage to Satya Nand, she remained in Fiji and raised their four children.
Between 2001 and 2008 Nand made 10 trips to Fiji and reunited with Wati, and he continued to use his false identity.
Wati remarried her former husband in Fiji on June 10, 2002, and lodged a resident visa application with the NZ Immigration Service in Fiji based on her marriage to Rana Khan.
In support of her residence application, her eldest son provided a letter of support, and Wati lodged a sponsorship declaration created by Nand in Tauranga in May 2002.
She and three of her children were granted a New Zealand residence visa on April 15, 2004.
Wati was aware of her husband's use of a false identity but failed to disclose the falsehoods to New Zealand immigration officials.
On her arrival at Auckland International Airport on May 23, 2004, she presented her NZ residence visa and was granted entry and a residence permit.
Judge Peter Rollo further remanded Wati on bail pending sentence on May 24, and the judge also called for a home detention report.