On 5 June 1241 at Montpellier he signed the act of divorce of Raymond VII of Toulouse and Sancha, daughter of Alfonso II of Aragon.
In the same collection of documents that contains the latter is one which shows Bertran and his brother Pons recognising the right of the Bishop of Avignon to land in Beauvezer, for which they owed two oboes or two partridges annually.
In an early work of 1233, Bertran criticises the oppressive behaviour of Raymond Berengar towards his Provençal subjects when he has made Crusader vows.
A similar theme appears in another poem, which criticises Charles for planning to fight Turks and Khwarezmians instead of dealing with Provence.
In one sirventes, Bertran complains about life in the Provençal capital of Aix-en-Provence: "I have to think about lawsuits and lawyers in order to draw up notarial acts; then I look out along the road to see if any courier is coming ... And then they tell me 'Get on your horse, you're required in court; you will be fined and you won't be pardoned if the hearing can't go ahead because of you'.
[6] In D'un sirventes mi ven gran voluntate, written after the death of the Emperor Frederick II in 1250 and before 1265, Bertran lambastes the Papacy for intentionally keeping the throne of the Holy Roman Empire vacant to extort money from imperial candidates: as if he owned the Empire.