i bought a pup 5 days ago which i paid good money for. as i drove away i realised i had left all papers behind. the owner then texted me saying she would post them to me. she didnt even know my name. i had to text her my details........a few days later the papers came but enclosed was a puppy contract from her asking me to sign. it states if i dont sign it she will take pupp back. can she do this AFTER i have bought the pup??/?