Australia Post has defended itself after a Perth woman, alleged to have left her young step-children home alone in Perth, blamed her actions on undelivered passports.
It is understood the 28-year-old accused flew to Bali last Tuesday to renew her visa while the children's father was also overseas.  
"Of course I am very concerned about them," she told Nine News through an interpreter. 
"That issue is between myself and the children. 
"If you're really concerned about my children can you please help me sort out this post office and locate the passports? Without passports my children will not be legal here."
A spokesman for Australia Post said the package was successfully dispatched from Australia on   December 15, bound for China.
"Delivery of this item in China is the responsibility of China Post once the item has been cleared by Chinese border authorities," he said. 
The woman said she had not been permitted to speak with the children, four and six years old, after they were taken into state care last Wednesday when police found them alone inside a Cloverdale home with the door unlocked.
Border Force officers arrested the woman when she returned to Perth International Airport on Thursday and charged her with two counts of knowingly engaging in conduct that may harm a child in her care.
The father is still reportedly overseas.
Neighbours told Nine that he was a friendly man and doting father and said they were worried about him. 
The WA Child Protection Minister Andrea Mitchell said she was "horrified". 
"This incident serves as an example of where the community actually takes a role in looking after and safeguarding children," she said. 
"The safety of children is the responsibility of all of us."
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