Got a call Saturday night - I demanded that the caller identify herself by ID number and she refused.  Got angry when I persisted and eventually hung up on me!  Before hanging up she had a man come on the call.  My advice is take control of the conversation and:  1. clearly state to them that the conversation is being recorded and when they acknowledge that then 2.  state that you are registered with the government on the Do Not Call List and that the recording will be forwarded to the government along with their ID/name.  
Be persistent about asking for their ID and tell them repeatedly that you want to be taken off their call list and eventually they will hang up on you

SPT environmental research.  After pressing as to why her number doesn't show up and to be removed from her call list, she pretended to not hear me and eventually hung up.  I can't block the caller because a number - v11132300290108 shows up.  What is the point?  How do people make money off of this scam?

Here's the name of the Operations Manager for SPT: Dora Abuaf. Send a message to her facebook account here:  http://www.facebook.com/dora.abuaf

they called asking if we recycle. then they went asking for the man or woman of the house was home. I said that she wasn't so he asked for the man of the house. I said there isn't one. he apologized then asked if I was the daughter. I answered yes and he continued to say "oh the beautiful daughter. well I'll call later when they're available honey"creeped me right out and won't be answering their calls again.

I got the same call, and was seriously annoyed!!  He said it was for an environmental survey for my city.  When he asked me all these random questions pissed and asked to speak to a supervisor and of coarse there wasn't one to talk to. I asked for the number to the office and the number he gave me was (403) 648-2643 I asked him where he was calling from and he said the Phillipenes.(sp?).....lol  I told them under no circumstances were they to contact me with a "prize" that I may win, which I obviously know it's just going to be to sell me stuff.  Don't waste your time on the "survey"

I just got a call from a blocked number. The caller (female) said she was with "SPT" conducting an environmental survey.I asked her what SPT stands for and she said it doesn't stand for anything.I asked her what kind of work they do and she said they conduct enviormental studies for Canadian companies.I asked her if she could give me some examples of companies that they work with and she replied, "No I can't, because we don't have any regular clients."I asked her where their headquarters were located and she said "Manila."I asked her if they have any locations in Canada and she said "no."I asked her if they do any work outside of Canada and she said "no." (Aside: yet they have no locations in Canada?)I asked her what the address of their location in Manila was, and she said, "It's in Manila, sir."I asked her if they have a website and she said "just search for SPT." I asked her if they had a URL and she said, "to be honest, sir, we do not."Honestly would have been appreciated from the start, not only after she was pressed for answers. Anyways, definite scam.