The reciprocity rule | The Attaché Desk

For information only. This article is an editorial orientation resource. It does not constitute legal advice. The scope of reciprocal treatment depends on the specific bilateral relationship between the sending and receiving states and can change without wide notice. Consult your mission’s legal or administrative office for guidance specific to your accreditation.

An earlier Brief covered how the Vienna Convention sorts mission staff into categories, diplomatic agents, administrative and technical staff, service staff, and how the category determines the baseline scope of immunity. What that article did not cover is a second layer that sits on top of the treaty framework and can expand or restrict it: reciprocity.

The principle is written directly into the Vienna Convention on Diplomatic Relations. Article 47 permits a receiving state to apply the Convention’s provisions restrictively toward a sending state, if that sending state applies them restrictively toward the receiving state’s own mission. The Convention sets the floor. Reciprocity determines how much, if anything, gets built above it.

How this plays out in practice

The clearest public statement of the principle comes from the US Department of State’s Office of Foreign Missions, which administers tax exemptions for foreign diplomatic and consular staff in the United States. Its stated rule is direct: no privileges are granted to a foreign official in the US unless US embassy and consular personnel receive the equivalent privileges in that official’s home country. Not every foreign mission in Washington or New York holds the same tax exemption card, because not every sending country extends the same treatment to American diplomats stationed there.

This is not a theoretical distinction. It has concrete, itemised consequences. Sales tax exemption, occupancy tax exemption, gasoline tax exemption and vehicle tax exemption in the US are each assessed and granted separately, and the level granted to a given mission’s personnel is calibrated to what that country does for American personnel on the equivalent point. A diplomat from a country that grants generous exemptions to American staff may hold a fuller exemption card than a diplomat from a country that does not, even though both hold the same formal accreditation category under the Vienna Convention.

The same logic operates in the EU context, though through a different legal instrument. Member states hosting EU institutions have an obligation under Protocol No. 7 on the Privileges and Immunities of the European Union to extend customary diplomatic treatment to missions accredited to the EU. Belgium’s treatment of the US mission to the EU, for instance, has historically been referenced as the benchmark against which the EU’s own reciprocal arrangements with the US were measured, precisely because Belgium is the host state for that relationship.

What this means for you, practically

The category on your accreditation card tells you the Vienna Convention baseline. It does not tell you the full picture of what you will actually receive in a specific host country, because that depends on a bilateral relationship you are not a party to and generally cannot see the details of. Two colleagues from different sending states, holding what looks like the identical accreditation category in the same host city, can have measurably different tax or customs treatment, and neither is wrong. They are simply subject to different reciprocal arrangements negotiated at the state level, sometimes decades before either of them arrived.

This is worth knowing before comparing notes with a colleague from another mission and concluding that something has been withheld unfairly. It may simply be a different bilateral arrangement. If a specific exemption or privilege that you expected does not materialise, the first productive question to ask your mission’s administrative office is not whether the category is being correctly applied, but whether the reciprocal relationship between your sending state and the host country covers that particular point at all.

Official and reference sources

Last published 30 July 2026.