Taxes. If you didn't know- “Starting Jan. 1, the IRS said, if a person accrues more than $600 annually in commercial payments on an app like Venmo, then Venmo “must file and furnish a Form 1099-K”
Before this change the bar to be taxable was $20,000 which seems reasonable for “commercial” taxes. That's a drastic change that'll affect more people, even you! Be sure to receive online pay with caution and make sure it can NOT be considered income. This affects not just venmo but zelle and cash app too.
Otherwise you find yourself owing money to the government