>Hi Joao,
>
>>Chave=.txtC_codigo.value
>>if clientes.c_codigo=chave * or if found()
>
>What is the control source of txtC_codigo? If it is clients.c_codigo, could this be happening: you type in a key, the key is saved into the table, you then check to see if the key exists, by doing a seek on the key you just entered into the table so of course the seek wil pass? Where is the code stored that you posted? Erik, does this sound possible?

Yep, if you're right about the controlsource.