What documentation is necessary for a player’s availability confirmation?

The correct answer is a written communication from the federation. This documentation is essential as it serves as an official confirmation that a player is available to compete at a certain time, specifically in relation to international competitions or obligations governed by FIBA. The federation represents the player's national governing body and has the authority to provide validated information regarding player availability.

A written communication ensures that there is a formal, recognizable record, reducing ambiguity associated with verbal agreements. This is critical in professional basketball, where player availability can impact team strategy and competition logistics.

While a medical certificate from a local doctor can indicate the player's physical condition, and a letter from the player's club could suggest the player's status with their team, neither of these documents holds the same authoritative weight as communication directly from the federation. Similarly, a verbal agreement lacks the necessary documentation to be considered reliable or actionable in an official context. Thus, a written communication from the federation is the most appropriate and necessary documentation to confirm a player's availability.