u/VeterinaryDentures

I only realised when I tried to claim JSA after the company liquidated and was rejected. Turns out there are no NI credits against my name because they got one letter wrong on my NI number. My payslips and P60s all show the incorrect number. They also used a short version of my first name, so I wonder if this prevented it from being flagged?

Weirdly I have found 2 payslips that use my correct NI number early in my employment, then it reverted to the incorrect one.

HMRC webchat said to send a cover note and P60s/payslip evidence to:
Individual Caseworker
PT Operations
North East England
HM Revenue & Customs
BX9 1AN

Does this sound correct?

Also is there a way of me checking the contributions that were made against the incorrect number?

The company I worked for went into voluntary liquidation after I'd been employed there for 12 years.

In 2025 I temporarily reduced my hours to help the company's finances and went back to working full hours in September 2025.

However, looking through my payslips, they never returned me to my full wage. I noticed too late for the company to fix it before liquidation.

The liquidators instructed a third party (let's call them ThirdParty Inc.) to oversee our statutory redundancy pay claims from the Redundancy Payments Service (RPS).

The company I worked for say they went to great pains to ensure the liquidators and ThirdParty Inc. were aware of the payroll error and had my full contractual salary to base calculations on. I also have an email chain with the CEO confirming the temporary nature of the reduced hours, and written confirmation of my correct salary from the company's external HR provider.

Despite this, ThirdParty Inc. has sent over documents relating to my redundancy claim where my rate of pay listed is the reduced rate. I flagged this with my contact there, and they responded saying they're required to calculate my rate of pay based on what was processed through the payroll, as that's the figure I contributed tax and NI on.

I'm wondering if I should dispute this. Redundancy payments are calculated based on weekly pay, and under ERA 1996 s.221, a week's pay is defined as "the amount payable by the employer under the contract of employment in force on the calculation date." To me, this means the contractual amount that I should have been paid, not what was erroneously processed by payroll (which was based on a temporary arrangement rather than a contractual change).

TL;DR: Company liquidated. Payroll forgot to restore my salary after a temporary reduction. The liquidator's third party is using the incorrect lower payslip figure for my RPS claim, citing tax/NI contributions. Should it be based on my actual contractual salary instead?