[Defeat]

If dropping envelopes is an issue why not send a box. This way the weight can be matched too.
Personally I had good success with this method.

For sure, if your boxer is letting you dictate what gets dropped off, it's an easy fix. If you do it yourself, of course do that.

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use the method once and see for yourself how it goes.

It only takes a single Incident to land you In hot water.

Same thing can be said about any method. Like I always say, if you're going to commit a crime, be ready for the consequences.