Welsh MPs are questioning the UK government minister in charge of passports about the plans to close the Newport office in south Wales.
If the plans are approved then the future of nearly 300 jobs are in doubt.
Home Office minister Damian Green will give evidence to the Welsh affairs committee at Westminter.
He will be joined by the chief executive of the Identity and Passport Service (IPS), Sarah Rapson.
Mr Green announced at the beginning of October that consultation was to begin on the closure of the Newport passport office.
The decision sparked an angry response from unions, opposition politicians and staff, with hundreds taking to the streets of Newport in a protest.