Some Darshan Yeshiva rabbis do not require bet din, mikvah or brit milah.
If you choose to convert with a Darshan Yeshiva rabbi who does not require brit milah, bet din or mikvah, it is important to remember that this may exclude you from being counted as Jewish in some communities. Traditionally, conversion to Judaism included brit milah, bet din and mikvah. This is still the standard for all Orthodox and Conservative conversions.
In the early days of Reform Judaism, Reform rabbis broke from this tradition, some not requiring brit milah, bet din or mikvah. Some of our rabbis hold to this view. Others hold closer to a Conservative rabbinical position by requiring mikvah at a minimum.
If you have any questions about this, please feel free to ask.