1 a letter or group of letters added to the beginning or end of a word to make a new word -- afijo
3 a letter or group of letters added to the beginning or end of a word to change its meaning, for example ’un-’ in ’unlucky’ or ’-ly’ in ’quickly’. -- Afijo
In view of the variety of identification methods used, it should be up to the trader to determine the lot and to affix the corresponding indication or mark.
From this point of view, the use of a standard model form on which to affix visas might prove beneficial.