Mercury gets debilitated when it is placed in the sign of Pisces, which means Mercury becomes very weak by virtue of its placement in the sign of Pisces. Accordingly debilitated Mercury in the twelfth house of a horoscope may not produce significant positive or negative results for the native, unless it is supported by the other positive or negative planets in his horoscope. The type of results given by such debilitated Mercury whether they are positive or negative; depend on the working nature of Mercury and on the overall tone of the horoscope in question.
When working positively, retrograde debilitated Mercury in the twelfth house of a horoscope in the sign of Pisces can bless the native with good results related to marriage, profession, fame, authority and many other types of good results depending on the overall tone of his horoscope. Such benefic retrograde debilitated Mercury can bless some natives with many types of favorable results through their marriages, if this retrograde debilitated planet is joined by marriage approving planets in the horoscopes of these natives. Benefic retrograde debilitated Mercury in the twelfth house in the sign of Pisces can get some natives married to people who may be the citizens of foreign countries and these natives may settle abroad on the basis of their marriages. For example, if benefic retrograde debilitated Mercury is placed in the twelfth house of a horoscope in the sign of Pisces along with benefic exalted Venus, benefic Sun is also placed in the twelfth house of this horoscope along with these two benefic planets and benefic Jupiter is placed in the fifth house of this horoscope in the sign of Leo, the native may receive this benefit. The native under the joint impact of benefic retrograde debilitated Mercury in the twelfth house in the sign of Pisces and other benefic planets may fall in love with a woman who may belong to a foreign country, he may get married to her and he may settle in her country on the basis of this marriage.
When supported by profession approving planets in the horoscopes of the natives under its impact, benefic retrograde debilitated Mercury in the twelfth house in the sign of Pisces can bless these natives with favorable outcomes through a number of professional fields. Such benefic retrograde debilitated Mercury can make some natives interested in the field of science due to which these natives may engage in professions related to this field and they may achieve success as scientific researchers, doctors, engineers, software developers and other such professionals. For example, if benefic retrograde debilitated Mercury is placed in the twelfth house of a horoscope in the sign of Pisces, benefic Sun is placed in the eleventh house of this horoscope in the sign of Aquarius, benefic retrograde Venus is placed in the first house of this horoscope in the sign of Aries, benefic Moon is placed in the sixth house of this horoscope in the sign of Virgo and benefic Saturn is placed in the eighth house of this horoscope in the sign of Scorpio, the native may become a doctor. The native boosted by benefic retrograde debilitated Mercury in the twelfth house in the sign of Pisces and other benefic planets may pursue the course of his higher studies in a branch of medical science and he may start practicing as a doctor, after his studies are complete.
The joint impact of such benefic retrograde debilitated Mercury and other benefic planets can bless this native with good knowledge of his field and he may earn money and success as a doctor. At the same time, if benefic Jupiter is placed in the eighth house of this horoscope in the sign of Scorpio along with benefic Saturn; and benefic exalted Mars is placed in the tenth house of this horoscope in the sign of Capricorn when all other planets are placed in the already mentioned houses of this horoscope, the equation may become improve a lot. The native boosted by benefic retrograde debilitated Mercury in the twelfth house in the sign of Pisces and other benefic planets may possess great expertise in his field of profession and by virtue of such expertise, he may become a very successful doctor. The joint impact of such benefic retrograde debilitated Mercury and other benefic planets can bless this native with very good amount of money, success and recognition through the field of medical science and he may also get blessed with his own hospital after his age of 36. Apart from this, benefic retrograde debilitated Mercury in the twelfth house in the sign of Pisces can bless the natives with good results through many other professional fields, when joined by profession favoring planets in their horoscopes.
On the other hand, malefic retrograde debilitated Mercury in the twelfth house of a horoscope in the sign of Pisces can trouble the native with problems related to marriage, profession, health and many other types of problems depending on the overall tone of his horoscope. Such malefic retrograde debilitated Mercury can hit some natives in the field of their marriage due to which these natives may come across many types of problems related to this field. Malefic retrograde debilitated Mercury in the twelfth house in the sign of Pisces can introduce conflicts to the marriages of some natives and these conflicts may aggravate with the addition of other negative planets to their horoscopes. In an extreme case of this type when present in combination with other malefic planets, malefic retrograde debilitated Mercury in the twelfth house of a horoscope in the sign of Pisces can break more than one marriage of the native, primarily on account of serious conflicts and arguments between the native and his wives.