The customs officers check commercial goods and ordinary people entering with possessions into the territory.

The symbol of HM Customs is a portcullis, surrounded by a wreath and surmounted by a crown, representing their authority and the monarch.

[10] The Maritime Journal reported that "Performance patrol boat specialist FB Design has recently delivered two high speed RIBs to HM Customs in Gibraltar.

Capable of speeds of over 50 knots these two RIBs are based on standard production hull designs developed by this Italian builder, but they have been fully customised to meet the requirements of the Customs".

HM Customs does carry out counter-drug operations, sometimes in conjunction with the Royal Gibraltar Police and Spanish Guardia Civil.