The timing of the HOA lien is really critical to determining to what extent the past-due HOA dues were discharged. Any dues owed prior-to the date of filing bankruptcy are dischargeable. However, if a lien was placed against the property prior-to the bankruptcy case being filed, then the lien survives and to sell the home you will have to pay the past-due amounts. Any HOA dues which accrued after the bankruptcy was filed are not discharged, and are owed. If, however, the lien securing the unpaid dues was filed after the bankruptcy was filed, there are a whole host of new issues to analyze - too many to list here. I would suggest that before you pay the fees, buy an hour or two of a bankruptcy attorney's time to analyze what you really owe and what you do not owe.
To answer your more direct question, there is no chance that paying the HOA dues opens the door for other creditors to seek repayment for a discharged obligation. You may voluntarily repay any debt discharged in bankruptcy after the case is closed.
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