Can your condo association put a lien on your condo if you haven't been able to pay your maintenance fees?

Short answer: yes.

Longer answer: If you are unable to keep up with paying your assessments, it's always a good idea to relay this information to your association management company and work out a payment plan.

Working out a payment plan demonstrates your good intentions to pay what you owe. Ignoring attempts to collect what you owe demonstrates your willingness to require that your neighbors pay your bills.