In order to maintain his credibility, it was decided that Garbo (or one of his agents) should forewarn the Germans of the timing and some details of the actual invasion of Normandy, although sending it too late for them to take effective action. Special arrangements were made with the German radio operators to be listening to Garbo through the night of 5/6 June 1944, using the story that a sub-agent was about to arrive with important information. However, when the call was made at 3 AM, no reply was received from the German operators until 8 AM. This enabled Garbo to add more, genuine but now out-of-date, operational details to the message when finally received, and thus increase his standing with the Germans. Garbo told his German contacts that he was disgusted that his first message was missed, saying "I cannot accept excuses or negligence. Were it not for my ideals I would abandon the work."