Like in many big cities, Buenos Aires has a few common scams that target tourists. Most are non-violent and rely on distraction, so staying alert is usually enough to avoid problems. Here are the main ones:
Taxi overcharging #
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Some drivers take longer routes or claim the meter is broken. 
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Always choose official radio taxis (black and yellow with company signs). 
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Using BA Taxi app or Cabify avoids this risk. 
Fake money swap #
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Vendors, taxis, or street exchangers may switch your bill for a counterfeit one and claim it’s fake. 
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Only exchange money at Western Union, banks, or official casas de cambio. 
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Use small bills for everyday purchases. 
Mustard or bird poop scam #
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Someone “accidentally” spills something on you, then another person offers to clean it while an accomplice steals your belongings. 
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If anything spills, step away quickly and check your bag. 
Pickpocketing & distraction #
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Common in San Telmo market, buses, Subte, and busy streets. 
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Thieves often work in pairs: one distracts, the other steals. 
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Keep bags zipped and phones out of sight. 
Street petition or “help me” scams #
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Someone approaches with a clipboard or papers asking you to sign something. 
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While you’re distracted, an accomplice may pickpocket you. 
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Politely decline and keep moving. 
Overpriced tours or fake tickets #
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Unofficial sellers near tourist spots may offer tango shows, football tickets, or day trips. 
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Some are overpriced or completely fake. 
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Always book through official websites, your hotel, or trusted agencies. 
ATM skimming #
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Devices may be attached to ATMs to steal card data. 
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Use ATMs inside banks, shopping malls, or hotels, not street machines. 
Quick takeaway: stick to official taxis or apps, exchange money only at secure locations, keep valuables close, and be cautious with strangers offering unsolicited help.