My grandpa opened the mailbox and found a marker code written inside. What does the letter code mean?. Full article 👇 💬

2. Apartment, Unit, Or Building Identifier Marks
In multi-unit buildings, codes can help postal workers identify specific apartments or units. A code like ‘A3’ might signify Apartment 3 in Building A. This system helps ensure that mail is delivered to the correct location, especially in buildings where apartments are not clearly marked. Residents should familiarize themselves with these codes to assist in accurate mail delivery.
3. Notes About Aggressive Dogs Or Safety Hazards
Postal workers occasionally leave codes as warnings about aggressive pets or other safety hazards. A code like ‘D’ or ‘DOG’ might warn of a dog on the premises, prompting extra caution. These markers are vital for the safety of delivery personnel and help ensure that mail is delivered without incident.

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