Trade and other receivables are recognized initially at fair value, generally the original invoice amount. Tenaris analyzes its trade receivables on a regular basis and, when aware of a specific counterparty’s difficulty or inability to meet its obligations, impairs any amounts due by means of a charge to an allowance for doubtful accounts. In addition, trade accounts receivable overdue by more than
180
days and which are
not
covered by a credit collateral, guarantee, insurance or similar surety, are provisioned.