Company A provided Date of Exit is 23OCT2018 but before that i joined Company B Date of Join 01OCT2018.

Company A provided Date of Exit is 23OCT2018 but before that i joined Company B Date of Join 01OCT2018.

How to i correct it. and Company A is big MNC they did termination and I received termination letter. How to show in Company B and help me explanation

Hi Few inputs ...
Now days all data are integrated, and it is always good to have accuracy in documents. As this year 2018, you have already delayed these corrections. Request new company to correct the documents and make corrections in all internal and external govt documents. As employers are authorized to correct, request with them.

They are not helping. and informing not possible

Everything is based on certain appropriate documents. There can not be suppression of documents & data. Play safe, intimate the facts. And leave the rest to the organisations concerned to deal appropriately. That much only you can do in the circumstances explained.