Friend was absconding from service how can he get experience letter

Hi sir,my friend has joined an it company and he couldnot continue due to the work pressure and health issues and informed that he would like to resign from the company.and company said it would try to adjust some facilities and later said it couldnot do so.and my friend on advice of some other colleagues had absconded from that company .later he was asked to pay the bond amount.he had paid that amount and he got marked as absconding in experience certificate which is of no use to him. he is totally depressed now...what shd he do not to be marked as abscondind in exp certificate.get reliving