You are employed by consultant and your wages are paid this employer.
Your services are confirmed by this employer. Hope you have the appointment letter, confirmation letter, pay slips issued by this employer.
Has this employer been deducting PF, ESIC etc and issued PF number, ESIC card………….
This employer has seconded you to some other company.
This (other) company has issued email for increase in notice period, which should not apply to you as you have not signed any contract of employment/service conditions with this company and it is not employer.
However the appointment letter issued to you by your employer (consultant) should also be carefully looked into.
This company has reverted your service back to your employer by some communication.
This seems to be alright as you were deputed by employer to work at this location.
Your notice period should remain as 1 month.
If the employer has issued any FNF statement showing 2 month’s notice period recovery you must decline to accept it in writing as ap by redg. post citing it as wrong and thus not accepted.
May approach your lawyer and show all of your docs on record.
The lawyer hat has seen all of your documents, has analyzed the inputs can advice you the best.