Is the employer required to verify for himself that the worker has washed the garment or rug soiled with urine, or is the worker's word sufficient?

If the worker is trustworthy, his statement that he washed the impurity from the garment is sufficient, and there is no need to follow up on him. However, if he is not trustworthy and there is doubt about his truthfulness, then it is necessary to follow up on him, and prayer in that garment is not valid until its purity is confirmed or strongly presumed.