At risk of boring all here (but done for those who may be new to our thread) these extracts give the information needed in regard to the lack of validity of SSPX marriages and confessions.
The question is, do those receiving these sacraments genuinely not know this? Or is it a case of refusing to believe anything that Rome says that is contrary to their ‘mission’?
“The SSPX considers itself faithful to the
Catholic Church and to the
Popes, up to and including
Benedict XVI. The SSPX bishops do not claim “ordinary” jurisdiction over the Society’s adherents, which would make the latter subject to them, not to the local diocesan bishops,
[21] and would amount to an obvious challenge to the
Holy See’s authority act of schism. Instead they say they possess an
“extraordinary” jurisdiction. This is of specific importance in Catholic canon law in relation to the sacraments of
confession and
marriage.”
Absolution of sins
"To absolve sins validly, a priest must be given the faculty to do so,
[22] a faculty that, normally, only the local bishop can give.
[23] Similarly, in normal circumstances a marriage can be contracted validly only in the presence of the local bishop or the parish priest or of a priest or deacon delegated by one of these.
[24] To overcome this difficulty, the Society says
[25] that absolution and marriage under its auspices are valid, on the grounds of its interpretation of
canon 144 §1 of the
Code of Canon Law, which states: “In common error, whether of fact or of law, and in positive and probable doubt, whether of law or of fact, the Church supplies executive power of governance for both the external and the internal forum”, and
canon 844 §2, which declares that, “whenever necessity requires or a genuine spiritual advantage commends it, and provided the danger of error or
indifferentism is avoided, Christ’s faithful for whom it is physically or morally impossible to approach a Catholic minister, may lawfully receive the sacraments of penance, the Eucharist and anointing of the sick from non-Catholic ministers in whose Churches these sacraments are valid.”
The Pontifical Commission Ecclesia Dei has stated that, in accordance with canon 144 someone who confesses to an SSPX priest while genuinely not knowing that the priest does not have the required faculty will be validly absolved, but that, with this exception, the sacraments of Penance and Matrimony in which SSPX priests are involved are invalid.
[26]"
http://en.wikipedia.org/wiki/Canonical_situation_of_the_Society_of_St._Pius_X#cite_note-McNamara-26
en.wikipedia.org/wiki/Canonical_situation_of_the_Society_of_St._Pius_X