How to redact a bank statement (so the numbers are actually gone)
Landlords, lenders, and visa offices routinely ask for a bank statement — but you rarely need to hand over your full account number or balance. The trap: drawing a black rectangle in a PDF viewer or Preview only *covers* the text. The characters are still in the file, and anyone can lift the box or copy-paste them out. Real redaction deletes the underlying text and rasterizes the region so nothing survives.