If a contract chooses her when played (eg. Dirty Contract), she is "chosen for the contract" for other cards (eg. Open Dossier). If the contract choice is an effect of the card in play (eg. Clandestine Contract), she's not chosen.
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Mata Hari
G4Independent. 2 votes (titled): You and Mata Hari can play cards requiring a sect and/or clan as if she were of that required sect and/or clan. Red List.
Rulings
When playing a card requiring a sect, her title makes her a titled vampire of that sect (eg. she can play Hand Intervention).
Orun and Aye cards cannot be placed on her as long as she's not a Laibon.
If her capacity is above 10 when playing Call the Great Beast, she burns and it is put into play. If her capacity is less, the card is put on her with tokens equal to her capacity, but she will not be able to add counters to it later on.
You can still use the burn options of cards with a requirement she could meet when you play them, but does not meet while in play.
Keeps their title and votes if they changes sects.
The ability ability cannot be used to fulfill card requirements if they are not played normally, like when using Concealed Weapon for an equipment or Piper or The Summoning for an ally.
When meeting a requirement to play a card, the vampire is treated as such for all the effects of the card, and only them, including duration effects. The vampire is not treated as meeting the requirements for effects the card has from being in play.