Certified Copy Stamp

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In almost every study some data are collected contemporaneously by direct observation or subject interview; for example, subject exclusion criteria. These data may be entered directly onto a case report form. The difficulties with direct case report form entry are that 1) there is no way to "source" the data, since the case report form is the source document, and 2) once you remove the case report form from the investigative site there is no information at the site to support the case report form entries. One strategy is to make a photocopy of the case report form, stamp it as a Certified Copy, then sign and date. Either the original source document/case report form or the Certified Copy may remain at the investigative site. Certified Copy stamps, pre-inked with red ink, 5/8" x 1 3/4" footprint, are now available from CDG.