Resigned-AIBU to want my original P45

[poopybumhole]

So I worked for my old company for 14 years before leaving due to a toxic work environment and my duties being taken away from me with no restructuring or discussion.
I emailed my notice and manager offered to let me off my notice period due to long service. He assured me I'd be paid for full notice period.
3 days after that email I went in on the last day of the month-the day manager had offered to let me go home. So I did. got some flowers, cleared desk and that was it,
No exit interview, no attempt at retention. I feel I was managed out but starting my own business so focused on that. Moving on and being positive.
Yesterday I recieved a photocopy of my P45 and what I assume is my final payslip. nothing else, not even a compliments slip. MyP45 shows my leaving date as the end of the month, NOT the end of my notice period.
AIBU to request my actual P45, an explanation or breakdown of my final payslip and a copy of my latest contract?
I've emailed to request that. I feel ACAS would be good to speak to and I have a local employer who has offered to assist me with this as he suspected this might happen.
Thoughts/experience welcome!

i’m confused

you say you left due to toxic atmosphere and you suspect you were managed out

but you seem to have also expected them to beg you to stay?

and presumably you have the agreement with your manager in writing

If you don’t have the paid notice pay in writing……

why don’t you have your contract?

I have the paid notice bit in an email.
I didnt expect to be begged to stay at all. Just thought it was standard? certainly normal in the company I previously worked for.
I never recieved a copy of my contract. It was supposed to be updated and emailed to me last year but wasn;t.

you thought it was “normal” to be “begged to stay?

no op it’s not

and if you have in writing, surely you just drop them an email back with the email confirming paid notice and say there’s been an error

I think you're overthinking all this. As a manager you keep your business head on and they're probably all ready thinking about next month and their existing employees.

I try to me a supportive manager but I always say the same thing when people leave 'I understand, you've got to do what's best for you'

If they outright said 'I would stay if....'
I would consider it but I don't probe about the why's (unless it's systemic issue that would trigger investigation/ fail audits etc)

Once you've put in notice I'm planning next month, and you're not in it.

I would expect your peers to organise any farewell treats not management

but your reaction in the first instance is to contact ACAS 😕

What would be the point in contacting ACAS?

You gave your notice and left without working your notice. If they've made an error re. your final working day then just e-mail them and ask them to correct it.

I never expected to be 'begged' to stay at all. I didnt say that so I'm not sure where you got that from.
My first reaction was to send a polite email asking for clarification. My next thought was to speak to ACAS as I have history with a grievance I won against this company 9 years ago and ACAS helped me then. My next thought was to ask on here so thanks!
@shakeitoffshakeacocktail thanks for your perspective, that helps! I am overthinking it, I just need it to be done properly if that makes sense? my peers did arrange farewell treats and manager wished me well. All civil which is how I want to keep it.!

what do you mean by a photocopied P45? Payroll systems I've worked with over the last ten years or so have all generated P45s as a PDF, so you wouldn't know if it was an original or a copy.
You are legally entitled to your payslip.

Leaving date - as long as you've been paid for the notice period, what does it matter?
The leaving date on your P45 is used to calculate the tax - I don't think the employer can legally future date it.

this is all very odd

and why am i surprised that there were serious issues even 9 years ago