pig farm, swamp, the zoo (omg she/he fell into the lion pen yesterday!), just chuck em into the sea small chance they will find it back and any traces to you, burn, dissolve with some chemical things, open an old grave in the graveyard and put it there?
or just hire a plain and drop the body out of it above a Belgian prison, they will be so confused that it'll take them 50 years and half a ton of Flemish fries to solve it
or just hire a plain and drop the body out of it above a Belgian prison, they will be so confused that it'll take them 50 years and half a ton of Flemish fries to solve it