Excellent.
As per your note, you do not have any PF dues with regard to your employment with Organization - 4, 5 & 6.
The 2 cheques that you have received are related to your account with regard to your employment with Organization - 3.
However, as I understand, you have not withdrawn or transferred your PF with regard to your employment with Org.-1 & 2, correct ?
If that is so, then I would suggest the following :
* Fill up the withdrawal forms for the organization - 1 and ask your organization (org - 1) to submit it at the respective pf office. You may be required to submit details pertaining to your family members (what document needs to be submitted can be inquired from your organization/the respective pf office where the contribution would have got deposited). The PF office will pay you your pf emolument, but will issue you a scheme certificate for pension.
* Fill up the withdrawal forms for the organization - 2 and ask your organization - 2 to submit it at the respective pf office along with this scheme certificate. Again you may have to submit several documents including your bank account details, particularly due to the pension aspect. If the submission is correct, you should receive your pf emolument within 15 days. You will also receive an intimation regarding your pension which will state details regarding where/which bank/which account will it get credited. Subsequent month onwards, you should start receiving pension amount too.
I know the process is a bit lengthy and tedious, but it's because you did not attend to it when you should have done it. Anyways, try it out and revert to me in case of any issues.
(One suggestion : Try meeting the respective PF AC of the particular group to which your company (organisation - 2) belonged to and check from him if this process is proper. At the end of the day, it is this PF Office which will need to process for your pension payment.)
Let me know the outcome.
Good Luck, A.B.