The lender bank has to first exhaust the remedies available before it to recover the outstanding amount from the borrower.
Further the guarantor is held liable to the extent of loan amount granted and not for continuous loan to any extent that the bank may grant to the borrower without the knowledge of the guarantor.
It is not very easy to wriggle out of your role as a guarantor in case the original borrower defaults. Nevertheless, you can still come out of the situation with your credit record intact.
You have been magnanimous and become a guarantor of the loan that a friend or a close relative has taken, but after a while you decide that it has not been your wisest move and you want to opt out.
When you decide to opt out, you will have to approach the lender directly with an application. Unfortunately the discretion is solely dependent on the lender whether or not it will let you go. The bad news is that, in the face of rising bad loans that is crippling the banking industry, the lender may not be willing to relieve you
In the present case the lender is reported to have colluded with the borrower hence you may not get proper justice.
If you find that the borrower has taken an additional loan over the original amount that has been sanctioned without your consent, you may ask the bank to relieve you. However, you will still be liable to repay the outstanding on the original amount sanctioned.
It's tough to say no to people who may matter to you, but you cannot possibly put your financial future in jeopardy.
If you have been a guarantor for someone's loan, it's obvious that you know her/him very well. Try to make her/him see reason and help her/him out as much as you can to repay your debt. If it means seeking the help of other close relatives or friends, do so at the earliest.
If you have granted the bank a hold over some of your tangible assets when you were guaranteeing someone else's loan, the bank will auction the same to recover the outstanding. However if these assets are in the real estate space and are either under mortgage or is an under construction property, you can fight your case saying that it has not been fully paid for.