A listing signature should say exactly what you get paid. `NONE|ANYONECANPAY` commits to no outputs. A leaked signature can be used to build a transaction that pays the seller nothing. `SINGLE|ANYONECANPAY` pins the seller’s payout output. Change that payout and the signature no longer works. Yesterday, Doginal Dogs listings using `NONE|ANYONECANPAY` were swept. If you’re not sure what your listing signature committed to, move the inscription to a fresh address you control. Once the move confirms, the old signature can no longer spend it. On Nintondo, a listing signature only works for the price shown on the market.