customs
The Spanish word 'aduanero' refers to anything related to customs, the government service which is responsible for the collection of duties and for the supervision of imported and exported goods. It can refer to the customs department itself or refer to a customs officer, who is the person inspecting, controlling, or supervising the traffic of goods across a customs border.
The customs officer rejected my request.
This sentence is showing a situation where your petition or request is denied by a customs officer. Customs officers have the authority to deny requests based on various reasons like improper documentation, illegal items, etc.
The customs officer inspected my luggage.
In this sentence, you're talking about a moment when a customs officer inspects your luggage. This is a common occurrence at airports and borders, as customs officers are in charge of controlling the goods that are entering the country.
The customs officer asked me for the passport.
This sentence describes a situation where a customs officer is asking for your passport. This is a routine process borne out of the need to verify the identity of the person crossing the border.