The pass of an informatory double, to convert it to a penalty double.

Informatory and warning signboards were placed on various routes coming towards the construction site for guidance of road users.

"He is hunting in the mountains," said a warrior, waving an informatory hand in the direction of a rugged ridge above the camp.

Their testimony, "The Informatory Vindication", was published in 1687.

Contrast with various competitive and informatory doubles such as takeout double and negative double.

I was kinda hoping for advice... INcase this came across to informatory...

There are many informatory doubles that anticipate a bid from partner, but "takeout double" typically refers to the double immediately over opening bidder.

See informatory double, takeout double, negative double, lead-directing double, responsive double and support double.

The informatory vindication; to which is subjoined, a collection of excellent laws, (or Eschol grapes) in favours of our covenanted reformation .

Around 1930, the term informatory double replaced negative double, and that term later gave way to takeout double as it is used at present; the original term negative double fell into disuse.