The word is Hausa for friend, used across Nigeria for the person who runs the street currency exchange.
What an aboki actually does
An aboki is a working relationship, not a physical spot, and his trade is the network he knows. When one person needs naira and another person has it, he knows both and moves the money between them.
How the rate is set
There are two rates for the naira. The one the Central Bank of Nigeria publishes (the CBN window) and the one that clears when people trade with each other on the street (the parallel market, sometimes called the black market). These are not the same number, and the gap between them goes up and down.
The street rate has two sides: a buying rate and a selling rate. You are handing over pounds, so the buying rate is your rate. It is the lower of the two. We do not have a published figure for his own cut, and the quoted rate may already hold it.
For a UK-side sender, the better price changes from day to day. Sometimes the aboki gives the family more naira than a licensed app. Sometimes the app does. The aboki rate and the app rate shows the sums, and how to run them on the day you send. With an aboki there is less paperwork. If he is on neither of the registers below, the Financial Ombudsman Service does not cover a dispute with him.
What UK law says about your aboki
Two things have to be true before he can take your money legally here, and you can check both yourself. An operator moving money between a UK sender and a Nigerian receiver as a business is a money service business.
He has to be registered with HMRC for anti-money-laundering supervision, unless the FCA already supervises him for that. HMRC guidance is explicit that informal money transmission counts under the rules, and that a business cannot offer these services before HMRC confirms the registration.
And because taking money from a customer to pay a beneficiary is a payment service, he also has to be either registered or authorised by the Financial Conduct Authority under the Payment Services Regulations 2017.
Check both before you hand over money. HMRC publishes the 
Anti-Money-Laundering supervised businesses register. The FCA publishes its 
Financial Services Register. Ask under what business name the person you are dealing with trades, and look them up. If they cannot answer, you cannot check them. Someone who moves money as a business and is on neither register is trading illegally in the UK.
When the chain breaks
The aboki disappears mid-transfer. His phone goes dark, the counterpart in Lagos never gets the call, and the naira does not arrive. A rate quoted at agreement collapses between agreement and pay-out and the operator quietly hands over less than promised. The 
Financial Ombudsman Service does not cover disputes with an unregistered operator.
When the aboki is the right tool
The aboki is a sensible choice when the receiver has no formal account to route money into, when the parallel-market gap is wide enough that the family is meaningfully ahead, or when the transfer is urgent and a bank freeze would cost more than the difference in the rate.
He is not the right tool when you need a written record, such as a tuition payment, a business invoice or a rent deposit. If the receiver has a working Nigerian bank account and a licensed transfer app quotes a rate within a small percentage of the parallel market on the day you send, use the app. If the amount is too large for you to bear losing it, do not send it through him.
The aboki does real work, and it can fail in the ways named above. Use him when the trade makes sense and you can bear the loss if it breaks; use the app when it does not. The other pieces on what happens to money once it arrives on the other side sit under arrival.
Corrections
- 2026-11-05: An earlier version of this page said most aboki operators sit outside the HMRC and FCA registers. We found no source that counts them, so the line is gone.
- 2026-11-05: An earlier version of this page said anyone who cannot give a business name is trading illegally. That is true of someone who moves money as a business and is on neither register, and the page now says that.
- 2026-11-05: An earlier version of this page said an operator must register with HMRC as well as the FCA in every case. GOV.UK says a business the FCA already supervises for money laundering does not also need to register with HMRC, and the page now says so.
- 2026-11-05: An earlier version of this page said the sterling side with an aboki is often more expensive than an app, the naira side is usually better, and the trade is faster. We have no count for these and the better price changes from day to day, so the page now says that and links to the sums.
- 2026-11-05: An earlier version of this page gave a size for his cut and his margin, said larger trades see a smaller margin, said he deals with two or three other changers, and said what moves the gap between the two rates and how wide it gets. We have no source for these, so they are gone.
- 2026-11-05: An earlier version of this page said he sells to the customer over the going rate. That was the wrong way round for someone sending pounds, who gets the street's buying rate, the lower of its two rates. It also said his margin sits on top of the street rate and that he takes a separate cut. We have no source for those, and the quoted rate may already hold his cut, so the page now says that.
- 2026-11-05: An earlier version of this page said he moves the money the same day, named the people in his network and the places he trades, said banks overprice or refuse this work, and said the same shape runs in Kenya and Latin America. We have no source for these, so they are gone.
- 2026-11-05: An earlier version of this page said there is no formal recourse and no ombudsman behind any aboki. That went too far. The Financial Ombudsman Service does not cover an operator on neither register, and the page now says only that.
- 2026-11-05: An earlier version of this page said notes and messages do not survive a UK court, and that an FCA compensation scheme does not cover money given to someone off the register. We have no source for the first. The second suggested that the Financial Services Compensation Scheme covers payment firms on the register, and it does not. Both lines are gone.
- 2026-08-02: An earlier version of this page linked to a GOV.UK URL for the HMRC anti-money-laundering supervised businesses register that no longer resolves. The register itself still exists; GOV.UK moved it to a new URL. The link now points to the current page.