Genesis 38:20-23

‘And Judah sent the kid of the goats by the hand of his friend the Adullamite, to receive the pledge from the woman's hand, and he did not find her. Then he asked the men of her place, “Where is the sacred prostitute who was at Enaim by the way side?” And they said, “There has been no sacred prostitute here.” And he returned to Judah and said, “I have not found her, and the men of the place also said, ‘There has been no sacred prostitute here'.” And Judah said, “Let her take it to her lest we be made ashamed. See, I did send this kid and you have not found her.” '

It is an indication of his discretion that Judah sends his close friend and not a servant to find the prostitute. Such activities while common should not be publicised. But as we know the woman was not to be found. So Judah decides to let her keep the pledge. He does not want to make a great stir and bring shame on himself. Most men may behave like he had but it was not a thing you publicised. And his friend can witness that he kept his part of the bargain. As far as he was concerned the matter was finished.