Labour MP Fiona Onasanya has been jailed for three months at the Old Bailey for lying to avoid a speeding prosecution.
Under laws introduced in 2015 any prison term leads to a recall petition, which will be open for six weeks and can force a by-election if signed by 10% of voters in a constituency.
However, this may not happen for several months as Onasanya has appealed against her conviction.
The recall petition cannot be opened until the appeal process has concluded.
Parliamentary rules only require the removal of an MP who is jailed for 12 months or more.
41mph in a 30mph zone
Festus Onasanya, the 33-year-old brother of Labour MP Fiona Onasanya, arrives at the Old Bailey, London. Image: Jonathan Brady/PA Wire.
Onasanya won the seat in Peterborough with a majority of just 607 from Conservative Stewart Jackson in the 2017 election.
She was convicted after a retrial of colluding with her brother Festus after her car was clocked going 41mph in a 30mph zone in the village of Thorney near Peterborough in July 2017.
The court was told that she was sent a Notice of Intended Prosecution (NIP) to fill out, but it was sent back naming the guilty driver as Aleks Antipow, an acquaintance of her brother Festus, who was away visiting his parents in Russia.
Her brother Festus was sentenced to 10 months in jail for his part in lying to the police.
Festus pleaded guilty to three counts of perverting the course of justice over speeding, including over the July 24 incident.