The fate of Palestinian refugees is too big a question to be dealt with solely in Israeli-Palestinian bilateral negotiations. The issue affects not only Israel and the nascent Palestinian state, but also the Palestinian refugees themselves and the various host countries, including Lebanon, Syria and Jordan.
Yet, there has been minimal coordination and consultation between the Palestinian leadership and the governments of Jordan, Syria and Lebanon, let alone between the Palestinian Authority (PA), established under Oslo, and the wider Palestinian refugee community.
Technically, it is not the PA but the Palestine Liberation Organisation (PLO) that bears responsibility for reaching a deal with Israel, since it was the latter that signed the Oslo Accords.
