Notice the behavior without forcing it.
Tell us whether the key enters normally, where it becomes difficult to turn and whether the handle or latch moves as expected. If a door has already shown a different behavior when open and closed, mention it. Do not keep testing a failing lock or take it apart to collect evidence.
The lock-repair page separates those observations from the diagnosis that needs checking. A new key does not necessarily fix a fitting or door-alignment issue.
Keep the local reference useful.
Forest Park’s city park list includes Starr Park on Park Avenue and Bill Lee Park on Main Street. A nearby landmark can orient a conversation, but give the full home address and the entrance involved. For a parked car, name the actual parking area instead.
If the key is simply inside a locked vehicle, the automotive page is a better starting point than a home lock-repair request. Include the make, model, year and status of any working spare.
A changed key arrangement is another question.
When the lock works normally but old copies should no longer operate it, ask whether the hardware is suitable for rekeying. For rented or managed premises, bring the authorized decision maker into the plan.
Forest Park is among the wider destinations in this directory. Call 678-951-0588 with the actual address so suitability and current availability can be checked. Ask what work and charge are proposed; this guide does not promise every address or job can be accepted.