Follow your route to the lock
Say which doors you can pass and where you stop. The main lobby may be accessible while the private unit remains locked, or a common entry device may be the issue. For residential lock questions, specify who controls the hardware rather than treating the whole building as one lock.
Use Collins Avenue with a number
The city lists Samson Oceanfront Park at 17425 Collins Avenue. It is a recognizable public destination along the shoreline, but a broad reference to Collins Avenue still leaves the building unidentified. Give your actual street number and entrance description, not just a nearby beach access point.
Explain what the key does
A missing key, one that turns reluctantly and a latch that does not release suggest different questions. Describe what happened during ordinary use and avoid forcing the mechanism. If the concern is past keyholders, changing key control is a separate conversation from correcting a sticking door.
Arrange approval before the work
Contact the owner or building manager where needed. Mention an entry desk or other arrangement that must be coordinated, without assuming a private request includes common hardware. Use the authorization guide and call to confirm availability for the address and task.