Ten volunteers kept written records of self-selected, daily events for a one-week period. After four months, they were given a surprise recognition test. This test consisted of original memories and several types of foils. In line with previous findings of Barclay and Wellman, it was found that acceptance of foils as one's own memories is a relatively common phenomenon. This suggests that pseudomemories may also occur in the absence of suggestions and repeated interviews and, more generally, that autobiographical memory is intrinsically unreliable.