Are wizards and witches in Britain really allowed to marry muggles?

Question

In the Fantastic Beasts movie we find out that American magical community doesn't allow any relationship with muggles.

I think it's quite a sensible choice, considering that even the smartest and strongest muggle is completely powerless when it comes to mind-altering magic, which is available to an average wizard. It's not only dark magic either - Confundus, Obliviate (which it appears anyone can use) and other charms and spells come to mind, and I don't even want to start on potions.

Of course, wizards and witches are almost as vulnerable to these things as muggles, but they at least know about them.

We have a 'good' example of Merope Gaunt basically forcing herself on Tom Riddle Sr, and at least one example of a witch not telling her husband about magic until they are married (Seamus' mother) which seems like a very bad idea even if she had no malicious intent.

I'm sure there were a lot of other instances of magical people (not Death Eaters either) abusing muggles and messing with their minds.

The point is - muggles and magicals are in no way equal. So any marriage between a muggle and a wizard/witch should immediately fall under suspicions of foul play on the part of the latter.

So do we have any information about legalities involved in a magical person marrying a muggle in Britain? We don't have many conclusive examples. Was there any way for the muggle in question to protect themselves against manipulation and abuse?

Answer 1

Yes, this was dealt with by multiple ministry departments, specifically the Auror office

One of the questions in the Grade One WOMBAT test, which was designed to "test whether the sitter would be able to exist safely and effectively within the magical world" asked about which Ministry department to report these types of issues to.

Question 1 out of 17
Which Ministry of Magic department(s) and/or committee(s) would you contact to resolve each of the following dilemmas?
Part 5 out of 5
Witch F fed love potion to a Muggle man, who has married her. When you went around with a wedding gift you discovered that she is using him as an occasional table.
☐ Auror office
☐ Misuse of Magic Office
☐ Obliviators
☐ Wizengamot
☐ All of the above
☐ None of the above
_{(W.O.M.B.A.T. Grade One - Part One)}

The quiz gave four points for "All of the above" and 2 points for "Auror office".

This would imply that these concerns were dealt with by the ministry, and that there was legislation in place to protect the muggle under Magical Law.

Answer 2

There is not any text saying that in Britain that you can't do it. It is frowned upon as you can tell from the amount of teasing received by half-bloods. The MoM could very well step in. So it is "Legal" but frowned upon.

"You dare speak his name with your unworthy lips, you dare besmirch it with your half-blood's tongue, you dare... He dared — he dares — he stands there — filthy half-blood — " —Bellatrix Lestrange's prejudice against Harry Potter's half-blood status

^Order of phoenix

Harry Potter and his children are half-bloods with known Muggle ancestry

Those who believe in the importance of blood purity consider half-bloods to be inferior because of their Muggle heritage, though superior to Muggle-borns. Occasionally the term "half-blood" can be used in a derogatory manner, similar to the epithet "Mudblood"; Bellatrix Lestrange and the portrait of Walburga Black did so on multiple occasions.

Some half-bloods expressed prejudice towards those with Muggle heritage, despite having some themselves, and clung to what wizarding heritage they had. Notably, Lord Voldemort hated Muggles and Muggle-borns, despite having a Muggle father, and denied his half-Muggle heritage, leaving hints that he was a pure-blood instead, emphasising his heritage to the famous pure-blood ancestor, Salazar Slytherin, to make himself more believable.[1] Severus Snape may be another example; his self-entitled nickname was "Half-Blood Prince" because his mother, Eileen Prince, was a pure-blood witch and his father, Tobias Snape, was a Muggle. However, Remus Lupin reported that he never used the nickname openly. This, as well as Snape's membership in the Death Eaters, suggests he may have been ashamed of his Muggle heritage, at least in his early life.[4] In fact, these people, along with some other Death Eaters, pretend to be pure-bloods, hiding their Muggle heritage from anyone else; most of them are half-bloods due to centuries of dilution and decline of what may be called as a true "pure-blood". Ironically (or perhaps because of), regarding the Prophecy concerning his defeat, Voldemort chose to go after a half-blood Harry Potter instead of the pure-blood Neville Longbottom.

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