Processing the check is IRS's responsibility. If they accepted your check, but do not process it, it is their fault. Once they accept your check, your end of the deal has ended. A while back, I got a notice that I did not pay my state tax.
1 The xiphoid process (Latin: processes xiphoideus) is a small triangular cartilaginous extension of the breastbone.
Xiphoidalgia â Xiphoid syndrome â Xiphoid Process Pain When Pressed. Xiphoidynia, also known as the xiphoid syndrome, is a condition where the patient feels pain and tenderness in the lower portion of the sternum.t is also the lowest and the smallest part of the sternum, marks the lower limit of the thoracic cavity and the lower border of the heart. At birth, the xiphoid process is cartilaginous, but it slowly ossifies (turns to bone) from the central core after middle age (usually around 40 years of age).