Have a stranger dressed like a federal agent attend your funeral. As things progress, have the “agent” walk around in a way that appears as though they are trying to be discreet.

Towards the end of the eulogy, have them go up to someone who was close to you, but not whoever was closest to you (let this person know ahead of time).

Have them walk out of sight and disappear for five minutes or so.

Have the “agent” return alone. Then towards the end of everything, have the agent leave a brief case next to your casket and walk away.

To finish things off, have a one of your friends (someone you trust but not one of those most close to you) stand up with everyone else, walk immediately over to the brief case, put in an earpeice, and the walk away from wherever the general crowd is headed until ultimately they are out of sight.

Three days later, have them set the briefcase on top of your grave, and a few hours later, have the “agent” go up to your grave with a note that says “I’m sorry,” and have them stay there until they are spotted by someone that was at the funeral (if it doesn’t happen that day, have extra money aside to have someone pay them to repeat the process until someone spots them there)