I think if you get a vanguard mentor missive and accept a bounty but don't want it if you made no progress on the bounty and you abandon it you get the vanguard mentor missive back with the same three weapon bounties on it. The reason I came up with this suggestion is because when I turn in my bounties I spam them really quickly and in the process I accidentally got a vanguard mentor missive and retrieved a bounty without reading what the other bounties were and I don't want to abandon it and then get nothing back from it. …Bungie plz