Prostitution in Portugal is legal, but it is illegal for a third party to profit from, promote, encourage or facilitate the prostitution of another. The legal status of prostitution in Portugal has changed several times. In , a harsh law dealing with sexually transmitted diseases came into effect, placing further restrictions on the registration of workers and forbidding the opening of any new houses.
Existing houses could be closed if thought to provide a threat to public health. An inquiry at the time estimated that there were 5, workers and houses, and appeared confined to the major urban areas of Lisbon, Porto, Coimbra and Evora.
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However, it was recognised that registered workers represented only a portion of the total population. This law was intended to eradicate prostitution. In , prostitution became illegal. This was an abolitionist position ending the prior era of regulation, including regular medical checks on sex workers.
The law had little effect on the extent of prostitution, and on January 1, , this law was partially repealed, making not sex work itself but merely its exploitation and facilitation illegal.
Prosecution was still possible under offences against public decency and morals, but this was infrequent, although regulation was in the hands of local authorities and enforcement was variable. Thus, this could be considered as an example of 'toleration'.
