Visa unacceptable refusal [duplicate]

It seems the UK requires more solid documentation, but even with better documents I doubt they would give him a visa.

• The letter states that your husband is a student in Germany and currently unemployed. That sounds like a contradiction, students are not usually labeled as "unemployed" if they are attending a recognized university.
• Many attendants of an integration course in Germany are refugees, not foreign students. Being enrolled in an integration course without also being enrolled in an university certainly looks bad regarding the student status. Also, in the reply to the last application it was pointed out that he had given only a start date, not an end date.
• He is being funded by family members who send €4.800 a year. It is extremely difficult to live in Germany on €400 per month. If I had that much, I wouldn't spend any on vacation trips. Also there seems to be no documentation regarding the source of this money.

In summary, the UK suspects that your husband might stay in the UK. It is up to him to disprove this suspicion, and he failed to do that.

As I understand it, you are an UK citizen who is moving to Germany soon, your husband is currently a refugee in Germany, and you want him to to visit the UK (not immigrate into the UK).

As soon as you arrive in Germany (within days, not weeks) he should inform the Job Center and the BAMF of your identity and his family status, and request an Aufenhaltskarte as a family member of an EU/EEA citizen. There are several reasons why this is urgent:

• The UK is in the process of leaving the EU and there may even be a hard Brexit. If that happens, it may be important how long he has held that status.
• His welfare payments will be affected and failure to inform the Job Center can be considered welfare fraud. A conviction in Germany would reduce his chances to get into the UK. (Or to stay in Germany, after Brexit, even if current law would require more serious convictions for deportation. There are political parties trying to change that.)
• You may later apply for an UK family permit under the Surinder Singh precedent. To qualify for this, you must have lived together in an EU state (i.e. Germany).

This will change your husband's circumstances in Germany: He will be able to use your combined family income to explain his finances. That's the second bullet point of the refusal letter. Once he has this card, he is no longer a temporary resident in Germany. That's the third bullet point of the refusal letter.