Use your rapport, goodwill, contacts, and skills like persuasion, negotiation and obtain:
-Copy of the bond. If required you can submit a written communication, under acknowledgment. Keep a copy.You should have secured a copy when you signed it. You are within your rights to obtain a certified copy.
-Some document from company that you have transferred the knowledge, to Mr...........to whom the knowledge has been transferred.
Some document from other employee that you have transferred the knowledge to him.
Some record of the company e.g emails etc. which can establish that you have transferred the knowledge.
Or you can draft and submit a written communication (under acknowledgment, and keep a copy)stating that you have transferred the knowledge, successfully to Mr......as per orders of Mr.........from period ...to................and from dated............Mr (Other employee) is successfully handling the assignments related to the knowledge you transferred, in place of you, and as per the orders of Mr......you are handling other assignments.
Since you have transferred the knowledge use your rapport and skills to convince the company to cancel the bond. If company liberates you from the bond, this shall be the best option.
-If company lodges a money claim company shall have to supply all bills towards all expenses incurred on you including food expenses. You should have kept a copy of all bills e.g. ticket, visa, airport transfer, boarding lodging, training expense, etc. Hope you have the training certificate.
It shall be appropriate to consult a local, competent lawyer willing to take up your cause.
-You should submit notice of resignation citing reasons e.g. sickness and ask the company to relieve you. You are liable to tender the notice pay. Submit company property under proper acknowledgment and obtain NDC.
You can ask for acceptance of your resignation, F&F, relieving letter, form 16,PF accumulation reports, PF transfer/withdrawal forms, work experience certificate, NDC/NOC, etc. Company can block relieving letter, but can not block work experience certificate.
Later if company lodges money claim you can avail the services of a local, competent lawyer, willing to take up your cause, wholeheartedly, and your lawyer can help you to liberate from the situation.
You alone would know how useful this training has been for your vitae.
In future consult the elders in the family, competent and experienced well wishers, lawyer/law firm, before jumping to sign on the dotted line. It is better than repenting later.
Valuable advice of learned Mr. Harbola and other members is sought.