Tomar cartas en el asunto

to step in; **to step in**; **to take action**; **to intervene**; **todeal with the matter**; **to take matters into one's own hands** (depending on context)

Tomar cartas en el asunto means to intervene, become involved or take action to deal with a problem or difficult situation.

The expression implies that passive observation has ended.

• an authority intervenes
• a manager decides to solve a problem
• someone finally acts after waiting
• a government responds to a crisis
• a person takes responsibility for resolving a conflict

The expression comes from an older meaning of cartas as official documents, legal papers or written instructions.

To tomar cartas was to assume formal responsibility for a matter by taking possession of the relevant documents.

Over time, the paperwork disappeared from people's minds, but the figurative meaning remained.

Today, the expression simply means intervening to solve a problem.

The expression is especially common when speakers believe action has been delayed.

For example:

Ya era hora de que alguien tomara cartas en el asunto.

The emphasis is often on finally doing something instead of merely talking.

Spanish has several expressions that describe different levels of involvement:

• Tomar cartas en el asunto → to intervene.
• Dar la cara → to accept responsibility publicly.
• Meterse en camisas de once varas → to get involved where one shouldn't.

Although all involve "getting into" a situation, each describes a very different kind of participation.

Do not translate the expression literally.

English speakers would never say:

He took letters into the matter.

Instead, use:

• He stepped in.
• She took action.
• They intervened.
• He dealt with the problem.

The important idea is active intervention.