The guy could be in trouble for that - toner is technically a hazardous item and can't be shipped. |
That looks like ink, not toner. Toner is a powder and would not seep thru paper envelopes like that.
If it was a toner cartridge, the seller should have sealed the cartridge in a poly bag and shipped it in a sturdy box like I do, NEVER an envelope. If it was a refill it yourself kit with toner in a bottle, same thing.
Even ink cartridges should be in a box. Items get tossed around a lot in the mail and an envelope alone is never enough protection.