colored paper with the words provide valid evidence.
Young woman validating ticket on city bus
Senior man validating ticket on public bus
Young woman hand inserts the bus ticket into the validator,
Young woman hand inserts the bus ticket into the validator
Young woman paying bus fare using validator
Businessman signing document contract approval , agreement validation, authority confirmation,
Businessman stamping approval contract document office desk with laptop, validating legal agreement
Two young students commuting by subway to their classes
Woman with crutches paying bus fare using smartphone
Doctor stamping medical document in office, confirming approval, healthcare certification,
Approval of a new drug for sale. Legalization of medicinal substances
Young woman paying for bus ride using modern public transport system
Woman commuting on bus using digital ticket machine
