When a bankruptcy is filed, other than the non-dischargeable
debts are discharged if the creditors don't object. If they do, then the court
decodes which debt to be discharged and which to be repaid. Creditors can object
and ask for the debts not to be discharged if any of the following conditions
exist.

The debt was acquired by intentionally fraudulent behavior

These actions are if you obtain any credit by claiming someone else's identity
by committing identity theft or you
borrow money when you don't have enough income to repay it. If a person is unable
to pay a creditor they usually think that the borrower has committed fraud and
their attorney often uses this fact in the court to make the debt non-dischargeable.

Debts Incurred as a Result of False Written Statements

If you write false statements while applying for a credit line, like stating a job that is not present, or overstating income, then the debts resulted on these credit lines become non-dischargeable in bankruptcy. The court considers these errors as fraud and judgment is given in favor of the creditors.

Fraudulent usage

If you have charged any luxury items or services exceeding $500 in 40 days before bankruptcy filing then these debts will not be discharged. If you get a cash advance in 20 days before bankruptcy filing then they are also non-dischargeable. If you were over your credit limit or didn't have enough resources to pay any debts, and you make small charges to avoid pre-clearances then such actions will also be judged as fraudulent.

Debts resulting from illegal or malicious acts, embezzlement, larceny, or breach of fiduciary Responsibility

If any illegal actions cause debts like taking property left in safekeeping, theft, or unable to fulfill the duties as a trustee, then these debts can be non-dischargeable. The usually give the definition of fiduciary responsibility.