On formal contracts, 千 is written as 仟 to prevent tampering.
Tips
usage
The 'banker's' or 'capital' form of 千 ('thousand'). On cheques, receipts and contracts the simple digit characters are replaced by elaborate ones (壹, 贰, 佰, 仟) so amounts can't be altered. Same value and reading as the everyday 千.
The person radical, side form of 人. The oldest sense was a commander of a thousand men, so the 'person' element points to that headcount-of-people origin.
Both sound and meaning: standalone 千 is 'thousand' and reads qiān, identical to this character. The person radical was added in front to make a tamper-resistant written form.
